Product Image of color Obsidian loading
Hydro Flask Lightweight Standard-Mouth Vacuum Water Bottle - 21 fl. oz.
Delivering ice-cold refreshment for your adventures—without extra weight—the Hydro Flask Trail Series Lightweight wide-mouth vacuum water bottle is built for long treks and spontaneous route changes.
- 25% lighter than the original 21 fl. oz. Hydro Flask standard-mouth bottle, thanks to thinner 18/8 pro-grade stainless-steel walls
- Tapered walls are thinner up top to save weight, and thicker on the bottom for durability
- Standard mouth opening is ideal for quick sips on the trail; plus, the slim bottle profile stashes easily into a pack pocket
- Honeycomb-insulated standard-mouth cap is leakproof and features a flexible perforated strap and aluminum pivots to cut weight
- TempShield® double-wall vacuum insulation keeps beverages cold for up to 24 hrs. and hot up to 12 hrs.
- Free of BPA and phthalates
Imported.View all Hydro Flask Water Bottles
Liquid Capacity (L)
Liquid Capacity (fl. oz.)
21 fluid ounce
2.8 x 10.2 inches
Fits In Cup Holder
Water Bottle Material
Loading Reviews... Loading Questions...