Hydro Flask 21oz Standard Flex Cap

Stainless steel, cup holder compatible, fits right in your pack—our reusable, refillable 21 oz Standard Mouth insulated water bottle keeps cold drinks cold for 24 hours, hot drinks hot for up to 12 hours, and holds enough hydration for hours of fun.

TempShield®? double-wall vacuum insulation keeps drinks cold up to 24 hours, hot up to 12
Flex Cap is leakproof when closed
Honeycomb™? Insulated Cap for maximum temperature retention
Made with 18/8 pro-grade stainless steel for durability, pure taste and no flavor transfer
Color Last™ powder coat is durable, sweat-free and colorful
BPA-Free
Dishwasher safe
Not for use on a stove, in a microwave or freezer