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Product Specifications


21 fluid ounces


18/8 Pro Grade Stainless Steel


7.5 Ounces

Item #


Style #


Item is returnable, but does not qualify for free returns.

Hydro Flask 21oz Lightweight Standard Mouth Trail Series

Lightweight and durable, the Hydro Flask 21 oz Lightweight Wide Mouth Trail Series Bottle is 25% lighter and provides the best cold hydration experience for long adventures. The narrow Standard Mouth opening is ideal for quick sips on the trail, and the slim bottle profile stashes easily into a pack pocket. Engineered to deliver long-lasting cold refreshment with TempShield® insulation in an innovative lightweight stainless steel design.

  • Ideal for lightweight hydration to keep you going further
  • Fits most backcountry hydration filters
  • Durable 18/8 Pro-Grade Stainless Steel construction
  • TempShield™ insulation eliminates condensation and keeps beverages cold up to 24 hours and hot up to 12 hours
  • Flexible perforated strap and aluminum pivots for added weight loss
  • BPA-Free and Phthalate-Free
  • Dishwasher safe
  • Compatible with Hydro Flip™ Lid and Wide Mouth Straw Lid