Ran out of ingrams, so I bought some menthol crystals to add to some products. Aftershave, shave cream and soap. I assume I should dissolve them prior to adding to cream and adding to gently melted glycerin soap. I'm not quite sure what would be the best way to dissolve and how much to add for a real good freeze. So far I've added 3/4 tsp to around 12 oz of masters bay rum, I've liked the results but I'd still like to kick it up another notch. Maybe another 1/4 -1/2 tsp? :freezing Ok, so you menthol addicts it's time to enable and help a brother out. I can use some tips and tricks for using the crystals.