By using the vacuum feature on the vacuum food sealer, all the air is removed from the container or plastic gear. Prevent the drive through espresso shop. I baked up a dozen in muffin tins, sprayed with non-stick spray, topped them with salt, pepper and grated cheddar, baked them @ 375 12-15 minutes. They can be washed frequently after using, and they'll look terrific once again each time.