Things You'll Need
Alcohol or oil
Menthol is a minty-tasting compound and takes a crystalline form when extracted from the peppermint plant. These menthol crystals can be used for everything from fragrances and food flavorings to additions to cigarettes and home remedies. In order to introduce the menthol into the item you are working with, you will need to melt them into another substance. You can use other scented oils to create a pleasant mix or use neutral alcohol to allow the menthol to be the focus, depending on how the menthol will be used in the end.
Fill a pot with water and place it on a stovetop until it comes to a boil.
Pour alcohol or oil into a heat-safe bottle and put the bottle into the hot water. Keep the bottle covered while it is in the water so the alcohol doesn't dissipate.
Drop a single crystal into the bottle and see if it starts to melt. Move the bottle around to help the crystal combine with the liquid inside.
Add the rest of the crystals into the bottle and remove the bottle from the water.
Cover the bottle and shake the bottle vigorously until all of the crystals have melted into the alcohol or oil.
Keep the melted crystals in a tightly sealed container to retain their potent scent.
Do not use disposable plastic bottles because they will melt and deform in the hot water.