The Hydro Flask 21oz Standard Mouth Flex Straw Cap is a cupholder-compatible insulated water bottle designed for everyday hydration on the go. With a leakproof straw lid that flips open for easy sipping and a Standard Mouth opening for everyday filling, it's a practical companion for the beach, the gym, the office or wherever the day takes you.
Why We Love It
Hydro Flask's TempShield® double-wall vacuum insulation keeps drinks cold for up to 24 hours — so your water stays refreshingly cold from morning to afternoon without any effort. The stainless steel construction means no flavour transfer and no lingering odours, and the slim profile fits most standard cupholders.
Everyday Use
Fill with cold water or your favourite drink, fill through the Standard Mouth opening, close the Flex Straw Cap and flip to sip. The lid seals securely when closed to prevent leaks. Not suitable for hot liquids through the straw lid. Not for use on a stove, in a microwave or in a freezer.
Product Details
- Capacity: 21oz / 621mL
- Mouth type: Standard mouth
- Includes: Flex Straw Cap
- Height: 23.87cm
- Diameter: 7.28cm
- Mouth diameter: 4.85cm
- Weight: 320.3g
- BPA-free
Care & Safety
- Dishwasher safe
- Flex Straw Cap not intended for use with hot liquids
- Not for use on a stove, in a microwave or in a freezer
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