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Hydro Flask
40oz Wide Mouth Flex Cap 2.0 Water Bottle

4.52 out of 5 stars
379 Reviews
$49.95 - $52.95



Why We Like the 40oz Wide Mouth Water Bottle with Flex Cap 2.0

For an ice cold sip of water on the ready all day long, we fill up Hydro Flask's 40oz Wide Mouth Water Bottle with Flex Cap 2.0. Our thirst quencher stays pure thanks to the zero-flavor transfer property of pro-grade stainless steel, so when we reach the lookout, we can revive our soul with the refreshing straight-from-the-mountain taste of unadulterated H2O. The double-wall vacuum locks in beverage temps, whether we want that crisp sip on a summer hike or a steaming flow of coffee on cold morning commutes.


  • Stylish and well-insulated water bottle built for daily use
  • 40oz capacity keeps you hydrated on even your longest adventures
  • Wide mouth boasts a smooth flow and compatibility with other lids
  • Flex cap offers excellent durability and an easy grab handle
  • Stainless steel construction is durable and offers a clean look
  • TempShield insulation stops condensation and maintains temperature
  • BPA-Free and Phthalate-Free for your peace of mind
  • Item #HYFZ01H
18/8 pro-grade stainless steel
40oz (1182mL)
wide mouth
[diameter x height] 3.58 x 11.2in [mouth diameter] 2.26in
Claimed Weight
1lb 1.6oz
Manufacturer Warranty