--- product_id: 251780989 title: "HYDRO FLASK - Coffee Flask 591 ml (20 oz) - Vacuum Insulated Stainless Steel Travel Mug with Leak Proof Flex Sip Lid - Wide Mouth - Black" brand: "hydro flask" price: "¥12312" currency: JPY in_stock: true reviews_count: 13 category: "Hydro Flask" url: https://www.desertcart.jp/products/251780989-hydro-flask-coffee-flask-591-ml-20-oz-vacuum-insulated store_origin: JP region: Japan --- # 100% leak-proof Flex Sip Lid Keeps drinks hot up to 12h Keeps drinks cold up to 24h HYDRO FLASK - Coffee Flask 591 ml (20 oz) - Vacuum Insulated Stainless Steel Travel Mug with Leak Proof Flex Sip Lid - Wide Mouth - Black **Brand:** hydro flask **Price:** ¥12312 **Availability:** ✅ In Stock ## Summary > ☕ Stay hot, stay cool, stay unstoppable. ## Quick Answers - **What is this?** HYDRO FLASK - Coffee Flask 591 ml (20 oz) - Vacuum Insulated Stainless Steel Travel Mug with Leak Proof Flex Sip Lid - Wide Mouth - Black by hydro flask - **How much does it cost?** ¥12312 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/251780989-hydro-flask-coffee-flask-591-ml-20-oz-vacuum-insulated) ## Best For - hydro flask enthusiasts ## Why This Product - Trusted hydro flask brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Lifetime Warranty:** Built to last with a lifetime guarantee, because your daily hustle deserves reliable gear. - • **Travel-Ready Design:** Fits most backpacks and car holders with a durable, powder-coated non-slip grip for your on-the-move lifestyle. - • **TempShield Technology:** Double-wall vacuum insulation locks in temperature and locks out condensation for all-day freshness. - • **Leak-Proof Flex Sip Lid:** Sip confidently without spills, compatible with Hydro Flex Cap and Straw Lid for versatile use. - • **Flavor Lock Stainless Steel:** No flavor transfer—enjoy pure coffee or tea every time without lingering tastes. ## Overview The Hydro Flask Coffee Flask 591 ml is a premium vacuum-insulated stainless steel travel mug designed to keep beverages hot for up to 12 hours and cold for up to 24 hours. Featuring a leak-proof Flex Sip Lid and a durable, powder-coated exterior, it fits seamlessly into your active lifestyle. Dishwasher safe and backed by a lifetime warranty, it’s the ultimate companion for professionals on the go. ## Description From the manufacturer S26 Hydro Flask Launch Review: Outstanding and no leaks! - I've used various insulated coffee mugs over the years and all of them have had the same problem - leaks. Apart from leaks, most other insulated mugs are very large considering the amount of hot or cold drink within. HydroFlask have completely changed the game with this insulted flask as it doesn't leak at all even when you turn it upside down! It also solves the size issue by being very small, more in line with the size of the contents. This also helps it to fit under the spouts of our coffee machine. The good news is that the size isn't at the expense of performance as the contents are kept hot for hours. I've found tea in particular stays hot for a long time. Travelling to a venue to watch some sport and having a hot drink for the duration is absolutely achievable. A points to bear in mind is that assembly and disassembly of the lid section can require some strength and so would not perhaps suit people with strength issues. Also, the red silicone seal needs to be fitted the correct way round (match the lid moulding with the cut outs on the seal) during reassembly as other wise this leak proof flask will leak! Personally, I think this flask is completely worth the cost for the high quality of the item. It's literally a game changer 😀 Review: No leaks, keeps drinks hot and looks great. - Best coffee flask I've bought to date. No leaks, and easy to carry. I have a pile of useless travel cups in the cupboard. This is the first one I've been able to consistently use. It's easy to wash as the lid comes apart. It also keeps my drink hot for hours which is handy when you work in the NHS as I never get to finish a cup of tea. Highly recommend. ## Features - SIP LID: Upgrade your wide mouth bottle with our leakproof Flex Sip Lid for on-the-go sipping without spills. Enjoy cold refreshments for up to 24 hours. - IDEAL DRINKING TEMPERATURE: Our double-wall vacuum-insulated thermos keeps beverages cold for up to 24 hours and hot for up to 12 hours. The TempShield technology prevents condensation and heat transfer to the outside. - LEAKPROOF WHEN CLOSED: Say goodbye to drips and leaks with this cap's leakproof design, ensuring your beverage stays where it should - IDEAL FOR TRAVEL: This insulated flask fits in most backpacks and car drink holders, making it the perfect companion for your daily routine; The durable bottle is powder-coated, providing a non-slip, grippy surface - SATISFACTION GUARANTEED: We offer a lif etime warranty against manufacturer defects. HYDRO FLASK stands behind our durable and robust materials and is committed to high standards. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07G3JC8YZ | | Age Range Description | Adult | | Age range (description) | Adult | | Base Diameter | 2.9 Inches | | Best Sellers Rank | 28,604 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 190 in Insulated Bottles | | Brand | Hydro Flask | | Brand Name | Hydro Flask | | Cap Type | Flex Cap | | Capacity | 20 Fluid Ounces | | Colour | Black | | Country Of Origin | China | | Customer Reviews | 4.3 out of 5 stars 5,845 Reviews | | Global Trade Identification Number | 00810911030146 | | Included Components | Lid, bottle, lid | | Is the item dishwasher safe? | Yes | | Item Dimensions W x H | 7.4W x 27.3H centimetres | | Item Type Name | Coffee Flask | | Item Weight | 13.2 Ounces | | Manufacturer | Hydro Flask | | Material Type | Stainless Steel | | Model Name | Wide Mouth Flex Sip Lid Flask | | Number of Items | 1 | | Pattern | Solid | | Product Care Instructions | Hand Wash Only | | Recommended Uses For Product | Coffee | | Recommended uses for product | Coffee | | Special Features | Top rack dishwasher safe | | Special feature | Top rack dishwasher safe | | Theme | Food & Beverage | | UPC | 810911030146 | | Unit Count | 1.0 count | | With Lid | Yes | ## Product Details - **Brand:** Hydro Flask - **Capacity:** 20 Fluid Ounces - **Colour:** Black - **Recommended uses for product:** Coffee - **Special feature:** Top rack dishwasher safe ## Images ![HYDRO FLASK - Coffee Flask 591 ml (20 oz) - Vacuum Insulated Stainless Steel Travel Mug with Leak Proof Flex Sip Lid - Wide Mouth - Black - Image 1](https://m.media-amazon.com/images/I/61f8eaHNJcL.jpg) ![HYDRO FLASK - Coffee Flask 591 ml (20 oz) - Vacuum Insulated Stainless Steel Travel Mug with Leak Proof Flex Sip Lid - Wide Mouth - Black - Image 2](https://m.media-amazon.com/images/I/61yqi7KtspL.jpg) ![HYDRO FLASK - Coffee Flask 591 ml (20 oz) - Vacuum Insulated Stainless Steel Travel Mug with Leak Proof Flex Sip Lid - Wide Mouth - Black - Image 3](https://m.media-amazon.com/images/I/71qHzqOJYrL.jpg) ![HYDRO FLASK - Coffee Flask 591 ml (20 oz) - Vacuum Insulated Stainless Steel Travel Mug with Leak Proof Flex Sip Lid - Wide Mouth - Black - Image 4](https://m.media-amazon.com/images/I/81PkBzLEH1L.jpg) ![HYDRO FLASK - Coffee Flask 591 ml (20 oz) - Vacuum Insulated Stainless Steel Travel Mug with Leak Proof Flex Sip Lid - Wide Mouth - Black - Image 5](https://m.media-amazon.com/images/I/71Na1bi+HsL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: What’s the difference between this one and the hydro flask 16 oz travel coffee flask | stainless steel & vacuum insulated?** A: Hello, Miguel from Tall Ridge here! The difference is just capacity in this case. Older versions of the Coffee Flask featured a lid with a lid that could be snapped shut as opposed to this one that twists. I hope you find this helpful. **Q: Could you eat soup out of this with a spoon ?** A: Yes, you could, but it's not ideal for soup unless you drank it from the bottle without a spoon. The mouth is about 3"wide and body is 6.5"deep. But you definitely could use it for soup. Just not sure how a spoon would work out. **Q: How tall is each size? (20oz doesn’t fit under the Keurig)** A: Hello - Mina from Tall Ridge here - Thank you for your inquiry! The 20 oz is about 9.3in which might be too tall for a Keurig. The Coffee Flask comes in three different sizes. The height of the 12 oz is 6.4in. and the height for the 16 oz is 7.9in. I hope that helps! **Q: The red lid insert molds easily. Can you get replacements for it?** A: I don’t know the answer. I did not have mold problem. Maybe because I would take the lid apart and soak it in hot sudsy water every time wash it. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Outstanding and no leaks! *by S***S on 14 September 2024* I've used various insulated coffee mugs over the years and all of them have had the same problem - leaks. Apart from leaks, most other insulated mugs are very large considering the amount of hot or cold drink within. HydroFlask have completely changed the game with this insulted flask as it doesn't leak at all even when you turn it upside down! It also solves the size issue by being very small, more in line with the size of the contents. This also helps it to fit under the spouts of our coffee machine. The good news is that the size isn't at the expense of performance as the contents are kept hot for hours. I've found tea in particular stays hot for a long time. Travelling to a venue to watch some sport and having a hot drink for the duration is absolutely achievable. A points to bear in mind is that assembly and disassembly of the lid section can require some strength and so would not perhaps suit people with strength issues. Also, the red silicone seal needs to be fitted the correct way round (match the lid moulding with the cut outs on the seal) during reassembly as other wise this leak proof flask will leak! Personally, I think this flask is completely worth the cost for the high quality of the item. It's literally a game changer 😀 ### ⭐⭐⭐⭐⭐ No leaks, keeps drinks hot and looks great. *by E***A on 15 October 2025* Best coffee flask I've bought to date. No leaks, and easy to carry. I have a pile of useless travel cups in the cupboard. This is the first one I've been able to consistently use. It's easy to wash as the lid comes apart. It also keeps my drink hot for hours which is handy when you work in the NHS as I never get to finish a cup of tea. Highly recommend. ### ⭐⭐⭐⭐⭐ Good quality and well designed *by C***S on 31 December 2025* Great product..like the twist top opening and carry handle . Keeps liquids warm for some time ## Frequently Bought Together - Hydro Flask Wide Mouth Bottle with Flex Sip Lid - Insulated Water Bottle Travel Cup Coffee Mug Black 20 oz - Hydro Flask Wide Flex Cap White 20 Oz - Hydro Flask Wide Mouth Lids- Accessory for Wide Mouth Water Bottle --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/251780989-hydro-flask-coffee-flask-591-ml-20-oz-vacuum-insulated](https://www.desertcart.jp/products/251780989-hydro-flask-coffee-flask-591-ml-20-oz-vacuum-insulated) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-06-21*