Glass jars have a specially designed clamp top lid with a durable rubber gasket to ensure a leak-proof and airtight seal. Glass is a healthier choice over plastic storage. Glass does not discolor, retain smells or leach chemicals into food. These jars are made from the highest quality of thick, durable, and BPA-free glass that is naturally chip resistant. No matter the task or where you choose to use it, these pop-top jars can be used for almost anything such as rice, sugar, spices, pasta, coffee, jams, butter, cheese, pickles, olives, or granola.