The Boss Vacuum Insulated Stainless Steel Travel Tumbler, 30 oz

Okay. I went on a bit of a "steel cup spree" on accident and ended up with the Big Boss as one of them. I also have the Yeti and the SIC. Reviewing them all would be pointless because they all insulate the same. I fill them up in the morning with Ice and a bit of Pepsi. By the time I get to work have emptied the Pepsi and have the cup still full of ice, usual around 9 am. When I head home at 4 or so there is a swallow of water in the bottom but still solid ice. I pour another Pepsi in for the drive home and whe finished still,ice and plenty of it. This holds true with all three.All of thee are the same despite what folks say. And trust me I have nothing but Yeti coolers. The only difference is the bases and how they fit cup holders. I have an F150. All of them will fit in the holder to a certain extend. The Yeti and Boss actually go almost to the bottom of the holder and fit nice and snug. The SIC is a bit wider and just kinda sits on the inside edge of the cup holder, maybe about 1/2 inch into the holder. As far as lids they all function perfectly, no spills, easy on and off. The Yeti has a black rubber gasket and the others are clear. Hope it helps. Finally if you find a 'used' one jump on it. I doubt it was ever actually used.

[ASIN:B00TG8ZRP0 THE BOSS 30 oz.Vacuum Insulated Stainless Steel Travel Tumbler]This is an outstanding product from an outstanding company that responded to my inquiry in a very positive manner! I ordered THE BOSS 30oz Vacuum Insulated Stainless Tumbler for myself a couple of months ago and it is everything I was looking for: perfect size; easily fits my Acura MDX; keeps beverages COLD for a very long time; easy to clean; lid with hole to sip or for straw. While it is used for many hot drinks according to the reviews, I keep it within arm's reach throughout the day filled with ice and the drink of my choice. It keeps my beverage very cold no matter the weather. Even in my car in the Texas heat I have a cold drink to enjoy after a few hours of shopping, errands or appointments--particularly if I can park in a parking garage. Before bedtime I fill it with ice and water to sip if I awaken during the night and in the morning I still have most of the ice and whatever water I didn't drink overnight! My husband watched and waited two weeks to make sure it wasn't a fluke--the skeptical man that he is--and then asked me to order him one. He, too, keeps it within arms reach while at home and travels with it daily. We highly recommend this product and seller! (Side note: I love using the extra long stainless steel straws that I found on Amazon. They're the perfect size!)

The stainless cup itself seems to be fine. With any thermos-type item, the heat will leak at the point where the inside connects to the outside. If this cup is filled with ice+water, the outside bottom of the cup stays at room temperature, but the top of the cup does get cold, showing heat is leaking into the interior. Don't have a Yeti cup to compare, but I can't see how this could much different on that cup--it's got the same connection between inside and outside at the lip. There is no visible seam on the cup inside wall. So, high marks there.Where this cup falls down is on the lid. The lid does have a nice seal, which appears to be silicone. However, the sliding closure is badly done. There are slots for the cover to slide in, and these allow liquids to get into the area between the cover and the main lid. Also, the vent hole for the lid is *under* the sliding cover, which is tightly connected, so the vent is essentially useless. Note that the sliding cover can't just be removed, as then the connection slots are open and able to leak profusely.FOLLOWUP: Ordered the SIC replacement lid for the 30 oz, and it fits well. The SIC lid is simple with the hole for sipping (with a notch for a straw) and a vent hole only. Much better! SIC lid:  Replacement Lid for 30 Oz SIC Cup Stainless Steel Tumbler. Also Works on Yeti Rambler 30 Oz.

Love it. I purchased this a few days ago after experiencing my buddy's Yeti cup hold ice water all day in a warm truck a few days earlier. After seeing this cup as a substitute to the $65 Yeti, and reading the reviews, I decided to spend half the money and go with the Boss. And I'm very happy I did! I received this cup yesterday and used it last night for the first time. I filled with ice and water before going to sleep and woke up this morning with about 1/4 of the ice still floating in the cup. But that's not even the best part - I didn't even have the top on! Over 10 hours with no top and still holding ice?? Whaaaaaaaa?! Yep, love it. I'll bet it would hold ice over a day with the top on. I don't know if the Yeti is better or not, but I can tell you this cup is better than I'll ever need. Buy it, you won't be disappointed.

I really like this because it fits into my cup holder in my car. I needed a stainless steel cup that was sturdy. The only reason I am not giving it a 5 star is because I had an issue with the lid. The lid has a opening that slides open and closed and a small plastic piece broke off and is not fixable. I did purchase one before this one and left it with my daughter and I think it still works. To be fair I have not contacted the company to see if they have a replacement lid I can get. But overall is worth the money difference than purchasing the Yeti.

I was so impressed with this mug. Kept my water cold for more than 10 hours. Bought it for the gym. Got one for my coffee drinking husband for Xmas. then bought a 3rd for a friend. You need however a handle, like Grivitz to carry the mug. It will make it easier. I also like the lid to this mug. Easy to get off which was a plus for me. So easy to open and get a drink. I don't use a straw but you can with this mug.I would give 10 stars if I could and so affordable. I saw one in Wal>>>>>> and didn't want to pay $25.00. A++++++++ product. Buy one you won't be sorry.