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What size bottle is TSA approved?
Transparent bottles of 100ml or less are fine. Common on the market is 37ml 60ml 89ml 100ml.
KEAN suggests that it is best to use a special silicone travel bottle. Except for solvents, other daily cleaning products can be used. There are many colors and many styles.
Leak-proof 3-oz silicone travel bottle, squeezable and flat.
The larger opening makes the air travel of the miniature travel bottle set easier to fill and clean.