literally just saw fleshlight selling these, 6 hours ago for like $60A few years ago I cound a site that sold USB powered warming rods for female toys. They can almost get them too warm if left too long and they are not overly robust in construction.
I got one much cheaper than that. They make them for a Japanese toy called Onahole. Look that up and I'm sure you can get one for under $20.literally just saw fleshlight selling these, 6 hours ago for like $60