{"product_id":"hydro-flask-insulated-stainless-steel-water-bottle-21-oz-birch-gray-tempshield-vacuum-leakproof-flex-cap","title":"Hydro Flask insulated stainless steel water bottle 21 oz Birch Gray | TempShield vacuum, leakproof Flex Cap","description":"\u003cp\u003e\u003cstrong\u003eThe Hydro Flask 21 oz Standard Mouth in Birch Gray is an insulated, stainless-steel water bottle with a leakproof Flex Cap that keeps beverages cold up to 24 hours and warm up to 12 hours.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eLightweight yet robust, this 21-ounce Hydro Flask blends everyday convenience with adventure-ready performance. Its TempShield double-wall vacuum construction minimizes temperature transfer, while the color-matched cap and flexible handle create a coordinated, grab-and-go bottle suited for commutes, workouts, and outdoor days. Built from pro-grade stainless steel, it resists flavor carryover and is designed for simple cleaning.\u003c\/p\u003e\n\n\u003ch3\u003eHow well does this bottle preserve temperature throughout the day?\u003c\/h3\u003e\n\u003cp\u003eTempShield double-wall vacuum insulation is engineered to reduce heat exchange, keeping cold beverages chilled for up to 24 hours and hot drinks warm for up to 12 hours under normal use. The insulating layer works without making the bottle bulky, so you still get a slim, cupholder-friendly profile.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDouble-wall vacuum insulation reduces heat flow.\u003c\/li\u003e\n  \u003cli\u003eDesigned to maintain 24 hours cold, 12 hours hot.\u003c\/li\u003e\n  \u003cli\u003eInsulation stays effective without major extra weight or size.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs the Hydro Flask 21 oz leakproof and easy to carry?\u003c\/h3\u003e\n\u003cp\u003eThe included Flex Cap seals securely to prevent spills when closed and features a flexible, built-in handle for one-handed transport. Toss it in a bag or clip it to a strap and you won’t worry about leaks during travel.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFlex Cap provides a reliable leakproof closure when shut.\u003c\/li\u003e\n  \u003cli\u003eComfortable flexible handle for quick grab-and-go use.\u003c\/li\u003e\n  \u003cli\u003eFits most vehicle and stroller cupholders for hands-free travel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow user-friendly is the bottle for cleaning and everyday use?\u003c\/h3\u003e\n\u003cp\u003eConstructed from durable stainless steel that resists retaining odors or flavors, this bottle is simple to keep fresh. Both the body and the cap are dishwasher-safe, making routine cleaning straightforward, though hand washing can be used for thorough care.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePro-grade stainless steel prevents lingering tastes and smells.\u003c\/li\u003e\n  \u003cli\u003eDishwasher-safe components for convenient cleaning.\u003c\/li\u003e\n  \u003cli\u003eWide enough mouth to accept ice cubes and easy rinses.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat size and activities is the 21 oz Hydro Flask best suited for?\u003c\/h3\u003e\n\u003cp\u003eThe 21-ounce capacity strikes a balance between portability and hydration capacity—large enough for a solid portion of daily fluids yet compact enough to fit in backpacks and cupholders. It performs well for daily commuting, exercise sessions, short hikes, and desk use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e21 oz capacity for moderate daily hydration needs.\u003c\/li\u003e\n  \u003cli\u003eCupholder-friendly shape for driving and travel.\u003c\/li\u003e\n  \u003cli\u003eLightweight profile ideal for active, on-the-go lifestyles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Hydro Flask 21 oz Birch Gray is aimed at anyone wanting a durable, stylish reusable bottle that balances insulation performance with everyday practicality. It suits commuters, fitness enthusiasts, students, and outdoor hobbyists who need a dependable, leakproof bottle that keeps drinks tasting fresh and maintains temperature for hours.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the Hydro Flask 21 oz dishwasher safe?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Both the bottle and Flex Cap are designed to be dishwasher safe for convenient cleaning.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the bottle leak if tipped in a bag?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: When the Flex Cap is fully closed the bottle is leakproof, making it safe for bags and backpacks.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Hydro Flask","offers":[{"title":"Default Title","offer_id":49211063435483,"sku":"B0DG3616FT","price":54.11,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0845\/1188\/3483\/files\/hydro-flask-front-bottle-birch-gray.jpg?v=1788280379","url":"https:\/\/homelypantry.co.uk\/products\/hydro-flask-insulated-stainless-steel-water-bottle-21-oz-birch-gray-tempshield-vacuum-leakproof-flex-cap","provider":"The Homely Pantry","version":"1.0","type":"link"}