note to impossible bottle
An "impossible bottle" is a mechanical puzzle. A bottle containing an object, a model ship, a plant, a fruit, that does not appear to be able to fit through its neck.
A "glory hole"is a kiln used by glass-blowers to reheat glass to soften it so that it can be reworked, or to keep it from cracking while adding handles and so on. It is also a sexual slang.
Information sourced from Wikipedia.