Hydro Flask Bottle Boots – Which Size Fits Your Bottle?

Fit Chart

Which Hydro Flask Boot Fits My Bottle?

The Small boot fits 12–24 oz Wide Mouth bottles and 32–40 oz Travel Tumblers, including the 28 oz All Around Tumbler in updated sizing. The Extra Small boot serves smaller Micro and 12 oz formats. Boots slide on snugly without adhesive and are sized by base diameter, so measure the base if you're between sizes. A boot can slightly raise overall height — fine in most cupholders, but check deep holders for clearance. At $7.95, a boot is the most affordable insurance for a bottle you use every day.