--- product_id: 478729013 title: "Hydro Flask - Water Bottle 621 ml (21 oz) - Vacuum Insulated Stainless Steel Water Bottle with Flex Straw Cap - Standard Mouth - Black" brand: "hydro flask" price: "345.36 DT" currency: TND in_stock: true reviews_count: 13 category: "Hydro Flask" url: https://www.desertcart.tn/products/478729013-hydro-flask-water-bottle-621-ml-21-oz-vacuum-insulated store_origin: TN region: Tunisia --- # Leak-proof Flex Straw Lid Keeps drinks hot 12h Keeps drinks cold 24h Hydro Flask - Water Bottle 621 ml (21 oz) - Vacuum Insulated Stainless Steel Water Bottle with Flex Straw Cap - Standard Mouth - Black **Brand:** hydro flask **Price:** 345.36 DT **Availability:** ✅ In Stock ## Summary > 💦 Stay cool, stay hot, stay unstoppable with Hydro Flask. ## Quick Answers - **What is this?** Hydro Flask - Water Bottle 621 ml (21 oz) - Vacuum Insulated Stainless Steel Water Bottle with Flex Straw Cap - Standard Mouth - Black by hydro flask - **How much does it cost?** 345.36 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/478729013-hydro-flask-water-bottle-621-ml-21-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 - • **Built to Endure:** Premium stainless steel construction resists dents and keeps flavors pure, built for your active lifestyle. - • **Effortless Cleaning:** Dishwasher safe with durable powder coating means less time cleaning, more time living. - • **Lifetime Confidence:** Backed by Hydro Flask’s lifetime warranty—because quality like this is forever. - • **One-Handed Hydration:** Innovative leak-proof Flex Straw Cap lets you sip effortlessly on the go—no spills, no hassle. - • **Ultimate Temperature Control:** Double-wall vacuum insulation locks in cold for 24 hours and hot for 12 hours, so your drink is always perfect. ## Overview The Hydro Flask 621 ml water bottle features double-wall vacuum insulation that keeps beverages cold for up to 24 hours and hot for up to 12 hours. Its leak-proof Flex Straw Cap enables easy one-handed drinking, while the durable stainless steel body resists damage and preserves taste. Dishwasher safe with a powder-coated finish, it’s designed for active professionals who demand convenience and reliability, all backed by a lifetime warranty. ## Description From the manufacturer S26 Hydro Flask Launch Review: Excellent, highly recommend - Excellent, keeps our drinks cold. It feels sturdy and looks great. Review: The best water bottle brand! - This is the second Hydro Flask bottle I’ve purchased (also have a larger capacity one). They are incredibly high quality bottles. The water stays cold for the time suggested (24 hours) and is completely leak proof, even when rolling around in a bag. It is definitely worth the money! ## Features - IDEAL DRINKING TEMPERATURE: Our double-wall vacuum-insulated bottle 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. - BETTER DRINKING ON THE GO: With double-wall, vacuum-insulated technology, our water bottle maintains the IDEAL temperature. The leak-proof Flex Straw Lid allows for easy drinking with just one hand. - DURABLE WATER BOTTLE: Our eco-friendly, sturdy stainless steel bottle is perfect for any type of sport. The durable construction withstands everything life throws at it, while keeping the taste of your drink intact. - DISHWASHER SAFE: Our water bottles come with a powder coating that makes cleaning a breeze. Enjoy more leisure time and less work with this convenient feature. - 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 | B09SBS12KG | | Age Range Description | Adult | | Age range (description) | Adult | | Base Diameter | 7.3 Centimetres | | Best Sellers Rank | 4,576 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 47 in Insulated Bottles | | Brand | Hydro Flask | | Brand Name | Hydro Flask | | Cap Type | Straw Cap | | Capacity | 621 Millilitres | | Colour | Black | | Customer Reviews | 4.8 out of 5 stars 694 Reviews | | Global Trade Identification Number | 00810028842410 | | Included Components | Straw, water bottle | | Is Oven Safe | No | | Is the item dishwasher safe? | Yes | | Is the item microwaveable? | No | | Item Dimensions W x H | 7.2W x 7.2H centimetres | | Item Type Name | Standard Flex Straw Bottle | | Item Weight | 0.32 Kilograms | | Manufacturer | Hydro Flask | | Manufacturer Warranty Description | Hydro flask lifetime warranty. | | Material Type | Stainless Steel | | Model Name | Standard Flex Straw Bottle | | Number of Items | 1 | | Pattern | Solid | | Product Care Instructions | Machine Wash | | Recommended Uses For Product | Water | | Recommended uses for product | Water | | Special Features | Dishwasher Safe, Leakproof | | Special feature | Dishwasher Safe, Leakproof | | Theme | Sport | | UPC | 810028842410 | | Unit Count | 1.0 count | | With Lid | Yes | ## Product Details - **Brand:** Hydro Flask - **Capacity:** 21 Fluid Ounces - **Colour:** Black - **Recommended uses for product:** Water - **Special feature:** Dishwasher Safe, Leakproof ## Images ![Hydro Flask - Water Bottle 621 ml (21 oz) - Vacuum Insulated Stainless Steel Water Bottle with Flex Straw Cap - Standard Mouth - Black - Image 1](https://m.media-amazon.com/images/I/612CCh1P50L.jpg) ![Hydro Flask - Water Bottle 621 ml (21 oz) - Vacuum Insulated Stainless Steel Water Bottle with Flex Straw Cap - Standard Mouth - Black - Image 2](https://m.media-amazon.com/images/I/81qVcNhfPxL.jpg) ![Hydro Flask - Water Bottle 621 ml (21 oz) - Vacuum Insulated Stainless Steel Water Bottle with Flex Straw Cap - Standard Mouth - Black - Image 3](https://m.media-amazon.com/images/I/71FooISuprL.jpg) ![Hydro Flask - Water Bottle 621 ml (21 oz) - Vacuum Insulated Stainless Steel Water Bottle with Flex Straw Cap - Standard Mouth - Black - Image 4](https://m.media-amazon.com/images/I/818bf4SYFsL.jpg) ![Hydro Flask - Water Bottle 621 ml (21 oz) - Vacuum Insulated Stainless Steel Water Bottle with Flex Straw Cap - Standard Mouth - Black - Image 5](https://m.media-amazon.com/images/I/71a6EtbNxYL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Am I able to buy any of the bottles that already have the flex straw lid on them or do I have to buy that lid separately?** A: You are able to buy bottles that already come with a flex Straw cap, but for the availability of those units, you need to check with a dealer directly. Your Hydro Flask team. **Q: Why does it state flex cap as being ‘girls’?** A: No idea. This came with a twist cap and it is fine. I use sports bottles with different caps for when in the gym etc. The hydroflask is a really solid design. **Q: What diameter is the base** A: Hello, The diameter of both the 18 Ounce and 21 ounce Standard mouth bottle is 2.87 Inches or 7.29 centimetres. **Q: Hi how do I know if it is legitimate?** A: it is legit, it's a great flask ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent, highly recommend *by M***O on 30 November 2025* Excellent, keeps our drinks cold. It feels sturdy and looks great. ### ⭐⭐⭐⭐⭐ The best water bottle brand! *by D***T on 10 October 2025* This is the second Hydro Flask bottle I’ve purchased (also have a larger capacity one). They are incredibly high quality bottles. The water stays cold for the time suggested (24 hours) and is completely leak proof, even when rolling around in a bag. It is definitely worth the money! ### ⭐⭐⭐⭐⭐ Best waterbottle I’ve ever purchased *by R***O on 22 February 2026* Totally recommend. Never leaks very sturdy ## Frequently Bought Together - HYDRO FLASK - Water Bottle 621 ml (21 oz) with Flex Straw Cap - Vacuum Insulated Stainless Steel Reusable Water Bottle - Leakproof Lid - Hot and Cold Drinks - Standard Mouth - BPA-Free - Black - Hydro Flask Flex Boot - Accessory Silicone Water Bottle Protector - Dishwasher Safe, BPA-Free, Non-Toxic Small - Hydro Flask Standard Mouth Lids- Accessory for Standard 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.tn/products/478729013-hydro-flask-water-bottle-621-ml-21-oz-vacuum-insulated](https://www.desertcart.tn/products/478729013-hydro-flask-water-bottle-621-ml-21-oz-vacuum-insulated) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-05-27*