Thanks for your question @johnnysneakers. That's short for Cartridges. It's a marijuana extract (THC), used with a vape pen. (about $35/cart) I have a medical marijuana card so i can purchase for medical use. The THC cream is $40 for 2oz. You can make your own cream, by adding THC oil to any cream of your choice, which is cheaper. Both of these choices (cream or vape) work for me, numbing my feet and helping me sleep thru the night. The cream does not show up in any drug related test. Just FYI for those who work. The cream also doesn't make you stoned either.