You can now buy our all-natural toothpaste on Costco.com. Save 30% when you order SprinJene from Costco.com as opposed to other retailers. This includes free 2-day shipping, with no Costco membership needed! Choose between 4-packs of your favorite SprinJene Natural: Adult Cavity Protection, Sensitivity Cavity Protection, or Sensitivity Fluoride Free. Also, we're now introducing SprinJene Boost on Costco.com! Get all 3 of your Boost toothpastes in one pack! Click below to shop SprinJene toothpaste on Costco.com.