--- product_id: 1477513 title: "Diamond 50 Ink Bottle (Blue)" brand: "twsbi" price: "€ 82.89" currency: EUR in_stock: true reviews_count: 13 category: "Twsbi" url: https://www.desertcart.be/products/1477513-diamond-50-ink-bottle-blue store_origin: BE region: Belgium --- # vibrant true blue pigment dual filling system 50ml premium ink volume Diamond 50 Ink Bottle (Blue) **Brand:** twsbi **Price:** € 82.89 **Availability:** βœ… In Stock ## Summary > πŸ”΅ Elevate your writing ritual with the Diamond 50 β€” where art meets precision. ## Quick Answers - **What is this?** Diamond 50 Ink Bottle (Blue) by twsbi - **How much does it cost?** € 82.89 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/1477513-diamond-50-ink-bottle-blue) ## Best For - twsbi enthusiasts ## Why This Product - Trusted twsbi brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Ergonomic Design:** Heavy, smooth glass bottle crafted for a luxurious hand feel and stability. - β€’ **Leak-Proof Confidence:** Secure cap ensures no spills, even when tipped or rolled. - β€’ **Flawless Craftsmanship:** Flawless bubble-free glass with a sleek colored anodized aluminum band. - β€’ **Precision Dual Filling:** Fill TWSBI pens perfectly or dip any fountain pen with ease. - β€’ **Collector’s Packaging:** Innovative foam-layered box protects your ink bottle like a prized artifact. ## Overview The TWSBI Diamond 50 Ink Bottle offers 50ml of vibrant blue ink housed in a flawlessly crafted, heavy glass bottle designed for both TWSBI and standard fountain pens. Featuring a dual filling system and a leak-proof cap, it combines functional elegance with durable packaging, making it a must-have for discerning pen enthusiasts. ## Description TWSBI Diamond 50 Ink bottle: designed for every type of fountain pen and specific upper cap design for Diamond , 530, 540, 580, Mini fountain pen. Review: Functional Art - This sounds crazy, I know. I spent $60.00 on two empty bottles, and I know I'll never regret it. The photo here can express something of how it looks, but the feel of this bottle is extraordinary: heavy, smooth, cool, and fits your hand in a way that makes it a pleasure just to hold. That the bottle is pleasant to hold is, of course, completely unnecessary-- just a delightful extra. The glass is flawless. Not a bubble. Not an...anything. Flawless. Beautiful. The bottle is shaped and weighted in a way that I was unable tip it over, even when I got really pushy with it. Also-- and this would seem a truly stupid thing to do with a glass container, especially when filled with indelible ink-- I set it upside-down on my table, gently batted it from hand-to-hand and watched as it rocked on its rounded lid without falling over. Gently, mind you; only a tiny bit of rocking. I'm not daring anyone to try table-hockey and expect the bottle to remain balanced upside-down on its lid. And this might not work with bottle empty-- but I can't envision a way in which one might need the bottle to perform empty, upside down, and batted about the table. I then laid the bottle on its side, still full of indelible ink, and saw that it does not tend to roll away. While the bottle was still on its side, I pushed it hard enough to get it to roll, and was reminded again that I often do not tighten lids properly. I wiped up the bit of ink that had gathered under the rim of the cap, tightened the cap properly, and rolled it around again. When the lid was tightened, it did not leak. These tipping and rolling tests were not done violently, but rather with the amount of force -- or maybe a little more-- than might happen as a mishap while writing. A four-year-old doing the "tipping test" could surely shoot the bottle off the table and onto a tile floor with unpleasant results. (Although I'm certain that the bottle would not tip while shooting across the table.) I did not fill the bottle completely before filling my pen. I put a little less than half an inch of ink in the bottom, tightened the cap, and turned it upside-down to fill the plastic reservoir. I righted it and was able to fill my pen with what would otherwise have been an insufficient supply of ink to properly cover the nib section while filling. desertcart did an excellent job of packing the shipment. Furthermore, the box created by TWSBI tightly fits a stack of sturdy slices of foam with each square slice cut to an opening in the middle of the right dimensions of the bottle at that layer. To open the package you remove one layer after another of the "foam sandwich". If you were to stack the empty sandwich afterward and slice from the top down, you would find the exact shape of the bottle hollowed out of the inside. Okay, well; I can't describe that very well. But I had read of the strength of the packaging; and indeed, I think I could have thrown the box against the wall or dropped it off the roof without damage to the bottle. (I didn't try that. I might have, but I had already opened both boxes before it occurred to me that it would have been a fun test. Also, I realized that it seems irresponsible to spend $30 on a glass bottle and then try to smash it against a wall.) My rule for reading reviews is "if you can't say anything's wrong, then don't say anything at all". I'm wary of a reviewer who finds a product perfect in every possible way. I generally trust writers who have analyzed the product well enough to have found some deficiency in the way it might be used by someone else, even if not themselves. If everyone is critical in that way, I can get a better idea of how the product might or might not suit my use. Therefore, if I find any way in which this product proves itself imperfect for my use, I will report it in an update to this review. So far, I have used it in every way I intend to use it and several ways in which I will not, and have no complaints. Oops! Outer packaging also by TWSBI, not desertcart. Bottles are shipped directly from TWSBI. 11/14/2011-- addendum to review: I am fortunate that my bottle didn't leak with the colored anodized aluminum band in place, even after my careful tightening. The band provides a second filling system for the TWSBI pens, which don't require dipping into the ink to fill. The colored band has a breathing hole for the TWSBI system. So: to use this for my traditional piston-fill or cartridge pens, I should remove the colored band, (over the sink, now that I have already filled the bottle), keep it in a safe place, and use the bottle without it. I don't have a TWSBI pen yet, but they're inexpensive for fountain pens ($56 and free shipping) and the TWSBI pens use this less messy but proprietary handy-dandy suck-up-the-ink system as well as the submerge-the-pen method, whereas I am limited to the submerge-the-pen method. If I got a TWSBI pen, I could use these beautiful colors; otherwise, plain black, but with the red logo on top. Review: Not a want but a need - If you have a Twsbi 580 or any pen with a standard international converter this is a must have. The clear bottle is amazing with the top full of color. It is glass so cleaning is a breeze. It is the only company that sells an inkwell that is sub $40. So amazingly inexpensive. Works like a charm and the ink flows into your 580 / converter with no drips. ## Features - Diamond 50 Ink Bottle - 2 way filling ink bottle - Fill TWSBI pens with perfect fitment or dip in with any pen ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B005WVV01K | | Best Sellers Rank | #239,623 in Office Products ( See Top 100 in Office Products ) #430 in Bottled Pen Ink | | Brand | TWSBI | | Brand Name | TWSBI | | Container Type | Bottle | | Customer Reviews | 4.8 out of 5 stars 87 Reviews | | Ink Color | Blue | | Item Volume | 50 Milliliters | | Item Weight | 7.04 ounces | | Manufacturer | TWSBI | | Manufacturer Part Number | M7442190 | | Model Number | TWS-M744 2190 | | Number of Items | 1 | | Package Information | Bottle | | Paint Type | Alcohol | | Volume | 50 Milliliters | ## Images ![Diamond 50 Ink Bottle (Blue) - Image 1](https://m.media-amazon.com/images/I/51FcdpRNrmL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Functional Art *by S***M on November 6, 2011* This sounds crazy, I know. I spent $60.00 on two empty bottles, and I know I'll never regret it. The photo here can express something of how it looks, but the feel of this bottle is extraordinary: heavy, smooth, cool, and fits your hand in a way that makes it a pleasure just to hold. That the bottle is pleasant to hold is, of course, completely unnecessary-- just a delightful extra. The glass is flawless. Not a bubble. Not an...anything. Flawless. Beautiful. The bottle is shaped and weighted in a way that I was unable tip it over, even when I got really pushy with it. Also-- and this would seem a truly stupid thing to do with a glass container, especially when filled with indelible ink-- I set it upside-down on my table, gently batted it from hand-to-hand and watched as it rocked on its rounded lid without falling over. Gently, mind you; only a tiny bit of rocking. I'm not daring anyone to try table-hockey and expect the bottle to remain balanced upside-down on its lid. And this might not work with bottle empty-- but I can't envision a way in which one might need the bottle to perform empty, upside down, and batted about the table. I then laid the bottle on its side, still full of indelible ink, and saw that it does not tend to roll away. While the bottle was still on its side, I pushed it hard enough to get it to roll, and was reminded again that I often do not tighten lids properly. I wiped up the bit of ink that had gathered under the rim of the cap, tightened the cap properly, and rolled it around again. When the lid was tightened, it did not leak. These tipping and rolling tests were not done violently, but rather with the amount of force -- or maybe a little more-- than might happen as a mishap while writing. A four-year-old doing the "tipping test" could surely shoot the bottle off the table and onto a tile floor with unpleasant results. (Although I'm certain that the bottle would not tip while shooting across the table.) I did not fill the bottle completely before filling my pen. I put a little less than half an inch of ink in the bottom, tightened the cap, and turned it upside-down to fill the plastic reservoir. I righted it and was able to fill my pen with what would otherwise have been an insufficient supply of ink to properly cover the nib section while filling. Amazon did an excellent job of packing the shipment. Furthermore, the box created by TWSBI tightly fits a stack of sturdy slices of foam with each square slice cut to an opening in the middle of the right dimensions of the bottle at that layer. To open the package you remove one layer after another of the "foam sandwich". If you were to stack the empty sandwich afterward and slice from the top down, you would find the exact shape of the bottle hollowed out of the inside. Okay, well; I can't describe that very well. But I had read of the strength of the packaging; and indeed, I think I could have thrown the box against the wall or dropped it off the roof without damage to the bottle. (I didn't try that. I might have, but I had already opened both boxes before it occurred to me that it would have been a fun test. Also, I realized that it seems irresponsible to spend $30 on a glass bottle and then try to smash it against a wall.) My rule for reading reviews is "if you can't say anything's wrong, then don't say anything at all". I'm wary of a reviewer who finds a product perfect in every possible way. I generally trust writers who have analyzed the product well enough to have found some deficiency in the way it might be used by someone else, even if not themselves. If everyone is critical in that way, I can get a better idea of how the product might or might not suit my use. Therefore, if I find any way in which this product proves itself imperfect for my use, I will report it in an update to this review. So far, I have used it in every way I intend to use it and several ways in which I will not, and have no complaints. Oops! Outer packaging also by TWSBI, not Amazon. Bottles are shipped directly from TWSBI. 11/14/2011-- addendum to review: I am fortunate that my bottle didn't leak with the colored anodized aluminum band in place, even after my careful tightening. The band provides a second filling system for the TWSBI pens, which don't require dipping into the ink to fill. The colored band has a breathing hole for the TWSBI system. So: to use this for my traditional piston-fill or cartridge pens, I should remove the colored band, (over the sink, now that I have already filled the bottle), keep it in a safe place, and use the bottle without it. I don't have a TWSBI pen yet, but they're inexpensive for fountain pens ($56 and free shipping) and the TWSBI pens use this less messy but proprietary handy-dandy suck-up-the-ink system as well as the submerge-the-pen method, whereas I am limited to the submerge-the-pen method. If I got a TWSBI pen, I could use these beautiful colors; otherwise, plain black, but with the red logo on top. ### ⭐⭐⭐⭐⭐ Not a want but a need *by A***Z on July 20, 2024* If you have a Twsbi 580 or any pen with a standard international converter this is a must have. The clear bottle is amazing with the top full of color. It is glass so cleaning is a breeze. It is the only company that sells an inkwell that is sub $40. So amazingly inexpensive. Works like a charm and the ink flows into your 580 / converter with no drips. ### ⭐⭐⭐⭐⭐ Nice little bottle *by J***Z on June 14, 2024* Great quality bottle. Use it with all my fountain pens. It looks really nice on the desk. --- ## 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/1477513-diamond-50-ink-bottle-blue](https://www.desertcart.be/products/1477513-diamond-50-ink-bottle-blue) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-08-21*