Oh yea.. they will drink that 8 oz down in a few days no problem.

This is the water bottles I use.
Docters Foster and Smith


I have the ferret size ones, and the one size smaller. The 32 oz and the 16 oz I think. I swear my rats drink all night too... Or they go for long periods of *in rapid succession* "chunk chunk chunk chunk chunk chunk , chatter chatter chatter chunk chunk chunk chunk etc etc etc..." Sometime I swear it's for 30 minutes straight LOL.

Anyways, I think boys drink more than girls... could be wrong, but mine sure do make me think that.