You can use a food bowl for free as long as you return it to the collection point. When you order from catering, you'll need to put down a deposit—1 token for a food bowl and 1 token for a spork, if you need one.
When you bring back your stuff (spork and/or food bowl), you'll get your tokens back, but only if you return everything. So, if you lose the spork, for example, you'll only get one token back."