I cook for my dogs, so I store their food in the frig. I used to use plastic until I read about BPA...it is a chemical found in most plastics that causes cancer (you know doggies can get cancer too!). I always wondered about the safety of plastic. Some plastics are starting to come out now that are 'BPA free', but I have replaced just about all my plastic with glass containers. That's what I store my doggies 'left overs' in now. :-)