I'm also eyeing zeolite to put in a massage oil, but not sure it'll work as I keep seeing it has to come in contact with water for the warming sensation to develop. Anybody know if it works the same in a massage oil where no water is used? Or if it goes totally wonky in oil like that and doesn't work at all? (Edit: After thinking more on this, I bet it would work fine. I've seen it recommended to put in lotions, and lotions usually have some type of oil in them, right?) Vegetable glycerin is the other warming product I've seen mentioned in some posts here. Have any of you compared the 2 to see which has the better effect? Darbla