Hydro Flask 21oz Standard Mouth Bottle

Item No. 16776-S21SXS


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Product Description


Whether you’re walking along the beach in the middle of summer or climbing your next mountain for a breathtaking view, choose the Hydro Flask 21oz Standard Mouth Bottle. This water bottle is designed with a TempShield™ insulation to maintain the temperature of a cold beverage for up to 24 hours and a hot beverage for up to 12 hours. The versatile, medium-sized design is perfect to pack away in your backpack or your car cup holder, so you can stay hydrated all day long. Consider the latest Hydro Flask 21oz Standard Mouth Bottle today.   


  • Lifetime Warranty
  • Versatile, medium size
  • BPA-Free and Phthalate-Free
  • Compatible with Standard Mouth Insulated Sport Cap
  • Durable 18/8 Pro-Grade Stainless Steel construction
  • TempShield™ insulation keeps the temperature of the beverage


  • Hold Beverage: Up to 12 hours
  • Cold Beverage: Up to 24 hours
  • Volume: 621 mL
  • Mouth Diameter: 1.91-inches
  • Diameter: 2.87-inches  
  • Height: 9.4-inches  
  • Weight: 11.3 ounces   

Customer Reviews

5.0 / 5.0
2 Reviews
5 Stars
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1 Star
Very nice product, the kids loved them. Great colors!
December 30, 2018
3 months ago
I got this for my newborn son. He can’t use it since he’s only 4 days old, but it was a future investment I know he’s going to love. My wife & I both own Hydro Flask, and now it’s his turn. These things are worth it.
December 14, 2018
3 months ago