I used to be told that as well about cans. After a bit of research, it does appear that most aluminum cans are now treated on the inside to reduce the reaction of the food with the can. The most concern is with highly acidic foods (citrus fruits, tomatoes), and most of it appears to be a taste issue, moreso than a long term health issue. Another concern seems to be that covering a can is usually not "air tight", which can contribute to spoilage of food and increased reactions.Originally Posted by Allmycats
HOWEVER, anyone know if there's any harm in refrigerating something in stainless steel and then feeding it again? (same day only). I remember years ago my mother told me never to put a can in the refrigerator, always transfer food to another container before refrigerating. Will the food react to something in the steel? I put a plastic lid on the cans of cat food, is that any different?
I would LOVE to find some sort of ceramic cat plate/bowl that has a plastic lid to fit! Maybe I should invent it
Storing cat food in cans seems to be fine. If I recall, the insides of all the cans I have used have always had a coating on the inside anyway. I always use airtight lids that are made for cans.
As for stainless steel, short term storage seems to be fine, from a google search. It seems that companies are beginning to develop lines of stainless steel storable containers.