The pump piston is designed for easy, one-handed use. The convenient finger loops allow you to fill the applicator with any desired liquid and inject it with a simple pressure. The XL size is twice the lubricant volume of most dispensers, so you can get the job done in fewer steps. This lubricant dispenser is made of high quality silicone, so it is only compatible with water and oil based lubricants. This non-porous and phthalate-free material can be easily cleaned with mild soap or sex toy cleaner.