Aluminium foil wrappings preventing from light, heat and unwanted odors.
Aluminum foil wrappings are less penetrable and helps preventing spoilage from exposure to light and heat. It is recommended keeping butter wrapped and stored in the coldest part of the refrigerator for optimal freshness.
Refrigerated, frozen and room temperature butter all should be stored tightly wrapped. Butter can pick up different flavors, so it is best to cover it with aluminum foil which makes it is less likely to pick up unwanted odors of other foods.