Hydro Flask Standard Mouth With Flex Cap - 21 Oz

Durable, yet 20% lighter than Hydro Flask's® other 40 oz. bottles, this lightweight stainless steel insulated water bottle is made for hiking and backpacking. The wide opening lets you add ice and the large 40 oz. volume holds hours of hydration.

• 18/8 pro-grade stainless steel for durability, pure taste, and no flavor transfer
• TempShield® double-wall vacuum insulation keeps drinks cold for up to 24 hours, and hot for up to 12
• Flexible perforated strap and aluminum pivots to minimize weight
• Leakproof when closed
• Bottle fits most backcountry water filters
• BPA-free
• Dishwasher safe