I see a lot of discussion about storing food in plastic five-gallon buckets that are not food grade. Many people feel that if they store them in Mylar Bags inside the buckets the food will be unaffected. To the best of my knowledge, this is correct, but I still feel there is an advantage to using food grade buckets.
The difference between food grade and non-food grade is the types of dyes used for coloring and the type of chemicals used to release the buckets from the molds. The problem I have with non-food grade buckets is that in the future you have no idea what that bucket will be used for. Buckets will be required for such things as storing food, pickling, brining, or making olives. I don’t know what affect the chemicals and dyes might have on my family or me. I just prefer not to take the chance.
Food grade buckets are easy to find and often can be obtained for free. Check with your local bakeries and supermarkets, they often will save them and give them to you for nothing. The buckets often are not marked as food grade. The store you purchase them from should tell you if there are food grade or if they contained food products. Most food grade buckets are white. The same type of plastic is used in the manufacture of both.