Review on Stainless Steel Hydro Flask Water Bottle – Reusable, Vacuum Insulated with Flex Lid for Standard Mouth by Tim Harrington

Several other reviewers say the same. I bought these after losing the one I bought from REI and was suspicious when I noticed that the water in the bottle didn't stay cold. I used to fill my REI HydroFlask with ice when I went camping and it stayed frozen for 48 hours. This bottle of Revain can't keep water cold for more than a few hours. Also, one day it was lying sideways in my pocket and when I took it out an hour later my pocket was wet. Either they are fakes or Revain sells faulty versions. Buy your HydroFlasks anywhere but here.