Well, I'll remind people here (at the risk of being teased again
![Roll Eyes ::)](http://www.glassmessages.com/Smileys/classic/rolleyes.gif)
) of my - totally unprofessional - method of testing if something is glass or plastic!
![Cheesy :D](http://www.glassmessages.com/Smileys/classic/cheesy.gif)
Tap it (gently) against your teeth!
![Grin ;D](http://www.glassmessages.com/Smileys/classic/grin.gif)
I can always 'feel' the difference immediately between glass and anything else.
OK, now let's have all the jokes about 'biting' glass again!