While the Manta COOL Eye Cups can be refrigerated, unfortunately, they can’t be heated. We intentionally used specialized beads that are specifically tailored for the purpose we’ve set for them to give you a much better cooling therapy experience. During the research process, we found out that beads that could both be heated and cooled only provide substandard results unlike beads that specialize in just one area. At Manta Sleep, we want you to have the best experience possible so we went for the beads that specialize in just one function.