It's the ultimate in male sex toy portability and convenience: "Brimming with a jelly-lotion, this sponge is based on AV starlet Ai Nagase's genitals. Remove the top, and insert yourself into the cup and a soft, multi-ribbed sponge will greet you with pleasure." Just don't get it mixed up with those boiling hot ramen noodles you're having for lunch. Ouch.

Ai in a Cup - Ai Nagase Sex Toy (J-List)
See also: Ai Nagase (interview w/photos @ J-Mate)
Ai Nagase (official site; includes photo and vidcap galleries)