StrongSpirit -> RE: Glass Toys (1/21/2014 1:17:10 PM)
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Real glass can break, particularly if it is poorly made (not properly annealed). I have some experience with it. I would not make a long insert-able. You can do some stress testing, but it is not perfect. But a short, roundish device is pretty safe. Things you rub against are safer. The object shown is more bulbous than long. Assuming it was properly annealed, I would use it carefully.
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