Earstretching.net

I'm a huge car guy, and these would be the best thing in the world if they're real.

http://i301.photobucket.com/albums/nn51/rtfk101/547363_329075227152122_165486363511010_904897_657439294_n.jpg

If not these, other car-related plugs would be just as cool, but I haven't been able to find anything ...

I've read that you should never wear them for more than a few hours at a time, and I've also read that you can wear them as long as you want. Are there any real problems to wearing them more than a few days?

Also, would the rule change if the tunnels were triangular?

Thanks