Picking up tank tomorrow; what else?

[harmless]

Hi,

I'm picking up a 40 gallon aquarium tomorrow for whatever hamster I end up bringing home.

I plan to also get a few necessities, the ones that any size of hamster could use. So not a wheel, and not a hideout. For the hideout, at first, I may just have a mostly-used roll of paper towels and a ceramic mug.

To buy tomorrow:

--A water bottle (I'll get an extra when I see how well the first one works)
--Food
--Bedding

Anything else?

Any quick tips on what kind of food? Since I'm in a different country from most of you, apparently, and the same things may not be available, can you tell me what ingredients to look for? (Thanks, over there, for running a good hamster forum and helping people in other countries.)

How about what kind of bedding?

I'll look for more information before I go, but I know you guys have a lot of experience of what actually works, rather than scientifically *should* work.