the rotastak big cages aren’t really designed for dwarf hamsters, Syrians yes
so you’ll have too get some metal ladders up the tubes so they can reach they should be right at home then

SHe won’t drink from it.

I bought the Habitrail OVO Suite for my hamster. The water bottle isn’t like a normal water bottle with the ball on the end. And my hamster can’t seem to figure out where the water is, and there isn’t really a place to place another water bottle.. and I’m not sure on what to do? HELP!

Is it ok too have one inch (2.5 cm) between the cage bars for a syrian hamster?