--- product_id: 639822823 title: "Standard Flex Cap Fir 21 Oz" brand: "hydro flask" price: "£42.03" currency: GBP in_stock: true reviews_count: 5 category: "Hydro Flask" url: https://www.desertcart.co.uk/products/639822823-standard-flex-cap-fir-21-oz store_origin: GB region: United Kingdom --- # Leakproof seal 12H hot hold 24H cold lock Standard Flex Cap Fir 21 Oz **Brand:** hydro flask **Price:** £42.03 **Availability:** ✅ In Stock ## Summary > 💧Hydrate like a pro—cool, hot, and leakproof, all day long. ## Quick Answers - **What is this?** Standard Flex Cap Fir 21 Oz by hydro flask - **How much does it cost?** £42.03 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/639822823-standard-flex-cap-fir-21-oz) ## 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 - • **Perfectly Portable 21oz:** Fits most cupholders and backpacks, making it the ultimate companion for work, workouts, and weekend escapes. - • **Zero Spills, Zero Stress:** Flex Cap design ensures a leakproof seal so you can toss it in your bag without a second thought. - • **Pure Taste, No Compromise:** Premium stainless steel with BPA-free materials guarantees no flavor transfer—just crisp, clean hydration. - • **Dishwasher Safe Durability:** Built tough for your busy lifestyle and easy cleanup, because who has time for hand washing? - • **Stay Chill or Sizzle All Day:** TempShield double-wall vacuum insulation locks in temps for 24 hours cold and 12 hours hot—your drink, your vibe. ## Overview The Hydro Flask Standard Flex Cap Fir 21 Oz is a premium insulated water bottle featuring TempShield double-wall vacuum insulation that keeps beverages cold for 24 hours and hot for 12 hours. Crafted from durable, BPA-free stainless steel, it offers a leakproof Flex Cap and is dishwasher safe for effortless maintenance. Designed for active professionals, its 21 oz capacity fits most cupholders, making it ideal for on-the-go hydration without flavor compromise. ## Description Great prices on your favourite Home brands, and free delivery on eligible orders. Review: Gotta love Hydroflask Review: Water turned cold fast ## Features - 24 hours cold, 12 hours hot - TempShield️ double-wall vacuum insulation - Leakproof when closed - Pure taste, no flavor transfer - Durable stainless steel - BPA-Free - Dishwasher safe - Not for use on a stove, in a microwave or freezer - Keep hot liquids out of the reach of children - water bottle, leakproof, insulated, 24 hours cold, 12 hours hot, dishwasher safe, 21 oz, cupholder compatible ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CJCRKWNT | | Age Range Description | Adult | | Age range (description) | Adult | | Base Diameter | 7.3 Centimetres | | Best Sellers Rank | 192,223 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 620 in Insulated Bottles | | Brand | Hydro Flask | | Brand Name | Hydro Flask | | Cap Type | Flex Cap | | Capacity | 1 Fluid Ounces | | Colour | Fir Green | | Customer Reviews | 4.7 out of 5 stars 117 Reviews | | Global Trade Identification Number | 00810096852403, 10810096852400 | | Included Components | Bottle | | Is Oven Safe | No | | Is the item dishwasher safe? | Yes | | Is the item microwaveable? | No | | Item Dimensions W x H | 14.6W x 22.9H centimetres | | Item Type Name | Water Bottle | | Item Weight | 0.3 Kilograms | | Item height | 9 inches | | Manufacturer | Hydro Flask | | Material Type | Stainless Steel | | Model Name | Standard Mouth Flex Bottle | | Number of Items | 1 | | Pattern | Solid | | Product Care Instructions | Hand Wash Only | | Recommended Uses For Product | Coffee, Soup, Tea, Water | | Recommended uses for product | Coffee, Soup, Tea, Water | | Special Features | Vacuum Insulated | | Special feature | Vacuum Insulated | | Theme | Sport | | UPC | 810096852403 | | Unit Count | 1.0 count | | With Lid | Yes | ## Product Details - **Brand:** Hydro Flask - **Capacity:** 1 Fluid Ounces - **Colour:** Fir Green - **Recommended uses for product:** Coffee, Soup, Tea, Water - **Special feature:** Vacuum Insulated ## Images ![Standard Flex Cap Fir 21 Oz - Image 1](https://m.media-amazon.com/images/I/51DdoZlyonL.jpg) ## Available Options This product comes in different **Color, Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Gotta love Hydroflask *by N***A on 7 July 2024* ### ⭐⭐⭐ Water turned cold fast *by K***N on 9 March 2025* ### ⭐⭐⭐⭐⭐ Gran producto *by A***S on 30 December 2025* Gran producto ## Frequently Bought Together - Hydro Flask Standard Flex Cap Fir 21 Oz - Hydro Flask - Flex Straw Cap for Standard Mouth - Leakproof - Honeycomb Insulated Cap with Flex Strap for Easy Carrying - BPA-Free and Toxin-Free - Dishwasher Safe - Black --- ## 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.co.uk/products/639822823-standard-flex-cap-fir-21-oz](https://www.desertcart.co.uk/products/639822823-standard-flex-cap-fir-21-oz) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-10*