Here's a quick guide how to maintain the food and drink supply at τοlabάκι. If you would like to help with this task leave a message on the Talk: page.
Not much to say, really. Get some low-cost snacks and drinks. Preferably below 0.50€ per item. Healthy and/or tasty things are preferred.. ;)
It's best if you get a separate receipt from the shop where you buy the supplies. You take the money that you have spent according to the receipt from the can that's labelled "Donation for food&drinks". Then you can scan the receipt and upload it to the wiki. Hopefully a scanner will be available at τοlabάκι.