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.