How to Keep Your ThermoFlask Clean


Mar 15, 2023

Torn paper
How to Keep Your ThermoFlask Clean


Two ThermoFlask Bottles

Here are a few tips to keep your ThermoFlask bottle clean and ready for enjoyment.

  • Hand wash your bottle, lid, and straw after each use with warm water and non-abrasive dish soap. Bottle brushes help get into the corners well. Do not use cleansers with harsh chemicals like bleach or chlorine as they can ruin your bottle. You can now wash your bottle in the dishwasher as an option.  Lids go on the top rack!
  • For a deep cleaning, remove the lid's O-Rings and soak in a 50/50 solution of water and vinegar.  To remove your large O-rings, gently pull on the tab. For the Small O-ring, use a toothpick, unfolded paper clip or fork to gently pull it out of the drinking spout cap. Place the new O-Rings, flat side down, into the open areas and use the flat side of a toothpick and gently press the O-ring back into place. Check your lid to make sure the silicone O-Rings are in place. The O-Rings will create the airtight seal to keep in the cold.

Cleaning Video Guides

After cleaning, make sure that all parts are completely dry before reassembling.

For replacement parts: