Tube and Collar: Dishwasher safe (top rack)
Flip-cap: Hand wash in warm, soapy water.
Shampoos, Conditioners, Lotions, Suntan Oil, Liquid Soaps, Condiments (ketchup, cooking oil, etc.), Hand-sanitizer, Body wash, Toothpaste, secret sauce, magic potions, and many other low and medium viscosity fluids.
GoToob Fluid Compatibility
The GoToob is made of high-purity, FDA food-safe silicone. Silicone is one of the safest and most inert materials in common commercial use (baby bottle nipples).