Hydro Flask's 21 oz is the perfect go-anywhere companion on your busiest days. It stashes easily in a small shoulder bag, your pack’s side pocket, or your car cup holder, and holds enough to keep you going for hours without weighing you down. The 21 oz Standard Mouth is one of our bestselling vacuum insulated water bottles because of it's size and versatility.
• Versatile, middle-of-the-road size
• TempShieldTM insulation eliminates condensation and keeps beverages cold up to 24 hours and hot up to 12 hours
• Durable 18/8 Pro-Grade Stainless Steel construction
• BPA-Free and Phthalate-Free
• Compatible with Standard Mouth Insulated Sport Cap
• Lifetime Warranty