It keeps water ice cold for 36 hours. I've gone through 10 other water bottles trying to find the best. Thermo Flask is the winner for me.

Absolutely the best product that I have bought so far. This product was recommended by a family member and it's worth every penny.

Nice size for my son to use in school. The flexibility of having a straw lid and a chug lid is great.

I love this item. I bought them previously but I just don't like that it doesn't have the rubber grip on the bottom.

I love these so much that I bought them in all of the colors they had. They keep water really cold, it lasts all day.

ThermoFlask comes through again. I love having both lids and the drinks stay cold and fresh.

I had the 32oz and now I have the 24oz and I’m in love with them both!!!

Great product! Having multiple lids is nice. Will buy more in the future.

Bottles keep liquids cold - add ice and it keeps cold for days!

This is made of quality material, keeps my water cold, and it’s easy to clean.