Hydro Flask 21oz Standard Flex Straw Cap
Sandpiper Brown
The Hydro Flask 21oz Standard Flex Straw Cap is the perfect everyday insulated water bottle for staying hydrated on the move. Compact, lightweight, and built to perform, it keeps cold drinks icy for hours thanks to double-wall vacuum insulation, without condensation or temperature transfer.
Finished in the earthy colourway, this bottle pairs premium durability with clean, minimalist style. The Flex Straw Cap allows easy, one-handed drinking, making it ideal for commuting, training, travel, school, and everyday use.
Built from professional-grade stainless steel and finished with Hydro Flask’s tough powder coat, this bottle is designed to go wherever you do — from the gym to the trail to daily life.
Key Features
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Capacity: 21oz / 621ml — ideal size for everyday hydration
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TempShield™ Insulation: Keeps drinks cold up to 24 hours
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Flex Straw Cap: Leak-resistant when closed, easy one-handed drinking
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18/8 Pro-Grade Stainless Steel: Durable, taste-free, and BPA-free
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Standard Mouth Design: Easy to fill, clean, and add ice
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Powder Coat Finish: Non-slip, sweat-free, and long-lasting
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Colour: Agave Green — clean, earthy, and versatile
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Fits Most Cup Holders: Great for cars, backpacks, and bike cages
Everyday Performance
The 21oz size strikes the perfect balance between portability and capacity. It’s compact enough to throw in a bag, yet large enough to keep you hydrated through workouts, travel, or long days on the go. The straw lid makes sipping effortless, while the insulation ensures your drink stays refreshingly cold.
About Hydro Flask
Founded in the USA, Hydro Flask is known worldwide for premium insulated drinkware built around performance, durability, and sustainability. Their bottles are designed to support active lifestyles while reducing reliance on single-use plastics — combining thoughtful design with proven insulation technology.
Care Instructions
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Wash before first use
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Hand wash recommended to maintain finish and longevity
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Dishwasher safe (top rack) for the bottle; hand wash cap for best results
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Do not use with hot liquids when using the straw cap
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Do not freeze or microwave
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Store with lid removed to allow drying between uses
Why Buy From Twelve Board Store?
✔️ Free shipping Australia-wide on orders over $90
✔️ Melbourne showroom with knowledgeable, friendly staff
✔️ Authorised Hydro Flask retailer — genuine products guaranteed
✔️ Easy returns and local customer support
✔️ Specialists in boards, outdoors, and everyday gear — 12 months a year
