The Easy Traveler, Inc. Flask’s thin construction allows it’s contents to freeze quickly.
To freeze the contents of the Flask:
Fill the Flask to no more than 70% of capacity, make sure Flask is fully inflated.
Place the Flask in the freezer with the spout up.
Run the Flask under water for a few seconds after removing from freezer.
To make ice in the Flask:
Fill the Flask to 25% of capacity, place in freezer with spout up.
Remove from freezer and run under water for a few seconds to soften the Flask.
Bend Flask to break ice if cubes are desired.