Desiccators, glass verses polycarbonate:

For long periods of time, or when a vacuum is needed, use glass only.
If it is only for overnight or not under vacuum, polycarbonate is suitable. They don’t have a good seal on them like glass desiccators so the silica gel needs checking regularly. They are unbreakable, can be easily washed and are very light-weight. To protect from hot objects like crucibles, cover the rack inside with aluminum foil and puncture it where the holes are. Never put acetone near them.

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