Hydro Flask Narrow Mouth 21 oz - Lightweight Trail Series

Less Weight. More Miles.
Durable, yet 25% lighter than our other 21 oz bottles, this lightweight stainless steel insulated water bottle is made for hiking and backpacking. The opening is ideal for quick sips, and the streamlined designs fits easily in your pack.

• Lightweight hydration to keep you going
• 25 percent lighter than our other 21 oz Standard Mouth bottles
• TempShield®️ double-wall vacuum insulation keeps drinks cold up to 24 hours, hot up to 12
• Made with 18/8 pro-grade stainless steel for durability, pure taste and no flavor transfer
• Flexible perforated strap and aluminum pivots to minimize weight
• Leakproof when closed
• BPA-Free