how bout normal water bottle? can rite..

A small 100 ml bottle is more than enough. Just get one that doesn't leak ok? Or the one that comes with habitrail cages is good too.

Basically small size bottles lar.

BTW what breed are you interested to get?

I think you should do your own research rather than waiting for people to tell you or just ask everything. You can have all the information from the internet, then ask here if you have doubts on understanding. Everyone here was newbie before they get knowledge. It's better to do own study and research than get spoon fed. I was a newbie on hamster too before. I did research and read up threads and forums before I get my very first pair of robos. About those products also you can get info online. Hope you have a wonderful researching time. Good luck.
Then you should start prepare more tanks and accessories by now for the new born pups.      And first of all is read up about breeding session before your female hamster give birth rather than asking for    when you saw pinkies.  Good luck!

my god...I think the big hamster is actually biting the smaller ones. When splitting them apart...the big one bit me...