Sidekick 2 Sleeve
This soft, stretchy, open-ended sleeve is made of a a pthalate-free elastomer. The Sidekick 2 has raised rings on the inside for added sensation. Elastomer is porous, meaning that it can't be sterilized, but the sleeve can easily be turned inside-out for cleaning with soap and water. Use with water-based lube.
This can be a fun addition to oral sex-- since the end is open, you can use the sleeve along the shaft of the penis like a foreskin, while leaving access for the head.