This 25cm "Tenga Throat Cup" cushion is dubbed as "big size" and large enough for you to stick your hand in and rest your head on. Just remember to stick your arm in it. YOUR ARM.
Starting October 13, this pillow will be available as prizes in Japanese arcades. Hope this guy (NSFW) doesn't get his hands on one. Hope that guy doesn't get his hands on anything.
あのTENGAがアームピローに 挿入もできます [IT Media]