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Does your ham manage to drink ok with the bottle in that holder? I had one of those & thought it was too low to the ground even for a dwarf ham, they are really cheaply made to so the bottles may well leak.
Is the glass one the living world bottle? I found them quite hard to fix too but the metal clasp thing works really well with the classic mouse bottles, I've been using the classic mouse for years now, either attached to the bars or with a wooden stand & have no problem with them.