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its really just a machine they use to make it there on the spot. So some othro's have it and others dont. The traditional one that you have, they have to send out for it..
Ask your ortho if you can switch to clear, I know they can make it happen but it will cost you...
and fyi, the clear ones get yukky too.. you have to clean those suckers.
Ever seen that movie "Just friends" lol
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