Yes, As a way to ensure the tube keys are properly recycled, and to reward loyalty, we will send one free tube of Davids toothpaste after receiving back 20 tubes keys from your past purchases. Please include a note indicating which flavor you would like along with you email address and return mailing address and send to: Attn: Tube Key Return Davids Natural Toothpaste 33360 Zeiders Rd Suite 106 Menifee, CA 92584 Note:  Please send in a cardboard box (do not use a paper envelope), as tube keys may break free during transit. We must receive all 20 keys in order to receive free product. ***Claims of lost shipments will not be honored***