Hiwill Stainless Steel Insulated Water Bottle 2 Lids, Cold 24 Hours Hot 12 Hours, Double Wall Vacuum Thermos Flask, Travel Sports Leak Proof Metal Bottle with Straw (Flamingo, 21 oz)

This insulated water bottle is exactly what I was looking for. There was still some ice on the morning of day 3. I have cold water all day & it's large enough (21oz) I don't have to refill every hour at work. It also has two lids, one to unscrew or one with a flip top & straw.

Keeps water ice cold

Didn’t keep ice as long as stated and also didn’t get the cap with the drinking straw