--- product_id: 22467959 title: "3L EVA Dual Open" brand: "wacool" price: "€ 20.69" currency: EUR in_stock: false reviews_count: 13 url: https://www.desertcart.be/products/22467959-3l-eva-dual-open store_origin: BE region: Belgium --- # 3L capacity for all-day hydration Double opening design for easy refill & cleaning 0.6mm extra-thick, wearproof EVA liner 3L EVA Dual Open **Brand:** wacool **Price:** € 20.69 **Availability:** ❌ Out of Stock ## Summary > πŸ’¦ Stay hydrated, stay unstoppable β€” the ultimate hydration upgrade for the modern trailblazer! ## Quick Answers - **What is this?** 3L EVA Dual Open by wacool - **How much does it cost?** € 20.69 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/22467959-3l-eva-dual-open) ## Best For - wacool enthusiasts ## Why This Product - Trusted wacool brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Built to Last:** Pressure-tolerant, 0.6mm thick EVA liner with double soldered seams ensures unmatched durability and leak resistance. - β€’ **Clean & Ready:** Comes with a 14-piece cleaning kit including flexible brushes and a collapsible drying rack for effortless maintenance. - β€’ **Hydrate Like a Pro:** Generous 3-liter capacity keeps you fueled through long rides and hikes without constant refills. - β€’ **Leak-Free Confidence:** Secure screw cap and push-twist hose connection guarantee zero leaks, so you stay focused on your adventure. - β€’ **Refill Anywhere, Anytime:** Innovative double opening design lets you refill quickly in any situationβ€”no more fumbling with tiny caps. ## Overview The WACOOL 3L EVA Dual Open hydration bladder combines a large 3-liter BPA-free EVA reservoir with a rugged 0.6mm thick liner and double soldered seams for superior durability. Featuring a double opening design, it allows quick refills and easy cleaning, supported by a comprehensive 14-piece cleaning kit. Its secure screw cap and innovative push-twist hose connection ensure leak-proof performance, making it a top choice for cyclists and outdoor enthusiasts seeking reliable, hassle-free hydration. ## Description ATTENTION: To avoid potential leaking, the screw cap should be securely closed as tight as possible! Twist the lid clockwise to fasten it tightly until the lid can not move any further under force! Please do not hesitate to mail us first if there is any issue about the product. Product Specifications: --Color: Green / Blue --Material: BPA-Free EVA --Size: 16" x 8" Flat --Tube Length: 40" Insulated --Weight: 250 g Important Notice: - The temperature of the water should be between -20 and 50 degree Celsius.Hydration Bladder cannot hold juice,milk,soft drink,liquor, etc. - Please soak the bladder for one hour in the warm salt water about 30-40 degree Celsius and then clean it before using.(The salt concentration should be controlled at about 7%.) - Clean with a mild detergent and rinse the reservoir thoroughly. Make sure it is completely dry, inside and outside, before storing. - Avoid contact with extreme heat/cold, harsh chemicals, UV light and sharp objects, these elements will damage the reservoir. ## Features - Capacity: 3 Liter (100oz), 100% odorless, tasteless, BPA- Free EVA material - Might be the most rigid hydration bladder on the market: 0.6mm extra thick liner is pressure-tolerant and wear-proof; double soldering sealing side technique has greatly improved durability. - Double opening design. As the most popular design for high end hydration systems in recent years, this allows you to refill in any condition. High flow, auto-lock mouthpiece to prevent leaking and comes with dust cover. - Insulated hose for better protection and help keep water cool/warm. Self-lock hose connector socket allows you to remove the hose quickly without any leaking. - To avoid potential leaking, the screw cap should be securely closed as tight as possible! Twist the lid clockwise to fasten it tightly until the lid can not move any further under force! Please do not hesitate to mail us first if there is any issue about the product. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B016SSZD3G | | Best Sellers Rank | #303,044 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #847 in Hydration Packs | | Brand Name | WACOOL | | Capacity | 6.3 pounds | | Color | Green(Double Opening) | | Customer Reviews | 4.4 4.4 out of 5 stars (2,535) 4.4 out of 5 stars | | Item Dimensions W X H | 0.4"W x 43"H | | Item Weight | 8 ounces | | Manufacturer | WACOOL | | Manufacturer Part Number | Series WR04 | | Material Type | Ethylene Vinyl Acetate (EVA) | | Model Number | Series WR04 | | Number Of Items | 1 | | Sport Type | Cycling | | Strap Type | Shoulder Strap | | Tank Volume | 3 liters | | Unit Count | 1 Count | | Upc | 707215638713 | ## Product Details - **Brand:** WACOOL - **Color:** 2pc Bladders With Clean Kit - **Item Weight:** 0.61 Kilograms - **Material:** Ethylene Vinyl Acetate (EVA) - **Sport:** Cycling ## Images ![3L EVA Dual Open - Image 1](https://m.media-amazon.com/images/I/71uk1cU--8L.jpg) ![3L EVA Dual Open - Image 2](https://m.media-amazon.com/images/I/61b4jdJ1B9L.jpg) ![3L EVA Dual Open - Image 3](https://m.media-amazon.com/images/I/71O7k9ubnCL.jpg) ![3L EVA Dual Open - Image 4](https://m.media-amazon.com/images/I/61-MaN1U1tL.jpg) ![3L EVA Dual Open - Image 5](https://m.media-amazon.com/images/I/71exqckbhJL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: Does it come with water?** A: What type of water does it come with? **Q: How to clean the hose?** A: Cleaning the hose is different from cleaning the bladder. You can clean the hose with a long handled, narrow bottle brush. The hose unclips from the bladder which means you can directly clean as much of the hose as your bottle brush will reach. There are several suitable bottle brushes available on Amazon. Searching for "Munchkin bottle brush" will return some good options. **Q: What proof is there that this is pba free and will it fit in my walmart ozark trail outdoor equipment backpack?** A: the test report release by SGS, Report No. is GZHG1411043611SP.and we don't know if WACOOL 3L bladder will fit in your backpack,you can measure the backpack`s interior space and then compare it with our bladder's flat size. **Q: What's the trick to make this thing stop leaking? Carried it hanging in my ruck, and the bar separated from the bag. Screw top also leaks...** A: Make sure you slide the bar tightly against the bladder's plastic top, doubled over. Don't touch the bar while hiking. I don't know why the screw top leaks. Make sure you tighten it securely. . ## Customer Reviews ### ⭐⭐⭐⭐⭐ A Must-Have For Backpackers *by on Reviewed in the United States October 4, 2016* I used this bladder for an Appalachian Trail section hike in the summer of 2016. It fit perfectly into the hydration compartment of my Kelty Coyote 80 backpack. I had no "plastic" taste, no leaks, and no malfunctions. I was concerned that the hose might disconnect or otherwise leak in my pack (and I was pretty rough with it at times), but it worked like a champ. I was able to remove it and reinsert it without emptying my pack -- I just pushed it (forced it) into the hydration sleeve (like I said, I was pretty rough with it at times).The clip-closure on the top is a MUST HAVE. It's way easier to fill (and clean & dry) with that wide opening. If you are hiking in an area with trickling water sources (or just a shallow puddle fed by a trickle), this thing is easy to fill by just opening the top flap.I cut my tube and inserted a Sawyer Mini filter "in line". My buddy was filtering water into hydration bottles. He wasted a lot of time filtering a each water stop, and it was much harder for him to "drink on the go". This one also has an insulation sleeve, though I'm not sure it did a lot to help keep my water cool(er).The only issue I encountered was with the push-on / push-off "shutoff" on the bite valve. If I pulled too hard to open the safety value, the end would pull off entirely. It easily snapped back on, so it wasn't a big deal for me. I just learned to be a little more careful opening the shutoff (or just leave it open since very little water drips from the bite value when you aren't biting down on it).This was a great product at a great price. ### ⭐⭐⭐⭐⭐ Well made, high quality and durable. Used for hiking/ backpacking and biking *by on Reviewed in the United States August 20, 2016* The item is well made and the materials are of excellent quality. First of all the seams are well made and can hold up to the stresses of hiking and biking. The top slides off to allow for easy access and drying.The top holds up well and will NOT slide off while using, and will not leak. I like the insulated hose because it does not condensate which is a big plus because of dusty conditions that sometimes occur during hiking or biking. The attachment mechanism is simple and holds well. The water will not leak out when the hose is removed, it will only come out when the hose is attached. The bite mechanism works well and the hose lock works fine.Recently took it on a 10 mile hike and put in cold fridge water at around 8 AM. The water was cold ALL day even at 8PM when I was back home. Functioned well and there was no after taste. (NOTE): rinse the bladder with a 7% saline solution and some warm water. This will remove any chemical taste.NOTE TO MANUFACTURER: Please fix the dust cap (cap that covers the drinking region) it keeps coming off and does not stay clicked into place. I went on a 10 mile hike and it got dusty at times, my cap came off and dust was all over the drinking part. I would recommend harder plastic cap that clicks in and stays in rather than the softer cap.Edit: 03/2020Works great to this day and I’m afraid this is the only water bladder I will ever need for the foreseeable future. It’s in the same condition as day 1. Bottom line is that it is of great quality and if you rinse it out after use and line dry it, it will take care of you. So far it has been on multiple hiking trips and never let me down. 3L is a wonderful capacity and should be enough for most hikes. Max hike I did was roughly 20 miles in the summer and 3 L was enough. (I’d carry a filter just incase). Overall very happy with the product. ### ⭐⭐⭐⭐ Why this 1 star review changed to 4 stars... *by on Reviewed in the United States October 19, 2016* I am upgrading my initial review from 1 to 4 stars. Here is why:1) Initially, I gave this hydration bladder only 1 star because it failed at the basic purpose of the product's intended use; namely, to keep water in. Mine leaked right out of the filler cap area the first time I put water in it, and I was obviously disappointed. If it leaked, none of the other features like the locking hose or the mouthpiece cap really mattered.2) WACOOL customer service reached out to me because I was looking for a way to return it and not only sent me a new one, but also offered to refund my money. That right there is EXCELLENT customer service, I give it another star simply based on the support and standing behind their gear 100%. Even if I decided I didn't like the bladder for some reason, it cost me nothing to give it a second try, so 2nd star I automatically awarded for WACOOL's great customer service.3) The 3rd star...WACOOL sent me a new replacement and I tested it out...it also leaked, though not quite as bad as the first one. [Note: I was not testing these bladders to capacity either at this point, nor was I putting significant pressure on the bladder itself, such as might be experienced when in a camelback or backpack.] I played around with different amounts of water in the bladder, and the closer I got to "capacity", the more it was prone to leak a little around the cap. Again, not quite as noticeable as the first one, but enough to be annoying and knowing my gear would get wet eventually. HERE IS WHERE I FOUND THE SOLUTION!! As I had just spent half an hour making a mess on the counter again and was about to give up, I made one more attempt: I took the cap off one of my old Nalgene bottles and tried it on the hydration bladder. Result: NO MORE LEAKING!!! At this point, my Nalgene is now without a lid, but since the point of me buying a hydration pack to begin with was to increase my carrying capacity and move away from a hard plastic container in my pack...this is a sacrifice I think I am willing to make. At this point, the other features like the locking-hose, mouthpiece cap, you can remove the hose even while bladder is full, the slide open/close access at the top actually began to matter now that the hydration bladder was not leaking on it's own...these all earned the product a 3rd star.4) The 4th star is awarded because once I found that a Nalgene lid fit and solved the leak issue, I filled it all the way to capacity and began to give it a real-life test with a little bit of pressure...ok, I was probably border-line abusing the hydration bladder at this point trying to see how much pressure it would take to fail...and it didn't. Not only that, but I never had an issue with any leaking at all out the slide open/close fold at the top, which is pretty impressive right there. Again, I put it through the ringer this time...and I was gaining confidence in the bladder material and seams and was impressed with how much pressure it was taking...I don't know exactly how many pounds of pressure I put on it, but it was at least 10-15 on the conservative side, and that was with the bladder maxed to capacity.**) I did not give it the 5th star for the following reasons: I had to sacrifice a Nalgene bottle to get a lid that didn't leak. Also, the measurement markings on the bladder are slightly off, and it doesn't truly hold 3L in the bladder: I measured exactly 3L in 1L increments and couldn't get 3L to fit without having to dump some out to close the bladder.OVERALL: It's a good hydration bladder. I'm happy with it now that I swapped the lid, and WACOOL's customer support was great. I'll probably buy another WACOOL bladder simply because their service was great. ## Frequently Bought Together - WACOOL 3L 3Liter 100oz BPA Free EVA Hydration Pack Bladder, Leak-Proof Water Reservoir - WACOOL 2L 2.5L 3L BPA Free PEVA Hydration Pack Bladder Leak-Proof Water Reservoir - Hydration Bladder, 1.5L-2L-3L Water Bladder for Hiking Backpack Leak Proof Water Reservoir Storage Bag, BPA-Free Water Pouch Hydration Pack for Camping Cycling Running, Military Green 1.5-2-3 Liter --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/22467959-3l-eva-dual-open](https://www.desertcart.be/products/22467959-3l-eva-dual-open) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-09-19*