Each scrub comes with a mini beeswax wrap. I find the lid of the mason jar does not like getting wet... So if you plan on keeping this in your bathroom or by the tub/shower I added the wrap so that you can use it to cover your scrub. Just remove the metal lid and store the lid in your pantry. Then secure the scrub using the beeswax wrap. Voilà! No rust, no hard to grip lid to open while you are in the tub, and a great reusable food storage option once you are done your sugar scrub!