As long as you don't put acidic stuff in it (like ACV), I believe 
@RoyalChick has said that it won't leach, so is okay.  (BTW:  They also should not have access to staples or screws, etc..not only can it get stuck or poke them, but the acid in their intestinal track can erode/break it down so it leaches into their system.  That is why it is SO important to make sure you pick up all metal 'stuff' after a project.)
RC can correct me if I am wrong - it was quite a while ago that I read that...however, you will come across that post shortly if you keep reading.  Maybe you can remind us all when you reach it!