ZeroNine's Pop Top makes refilling cartridges easy! The Pop Top holds everything in place and provides you with fool-proof instructions to show you how to wind the ribbon. It eliminates all guess work and errors. The Pop Top holds the used cartridge while the opening tool lifts the lid straight off. There are alignment pins that hold the cartridge and rubber rollers in place while emptying, refilling, and threading the new foil. Using the Pop Top allows you to save time and money anytime you use it. The Pop Top allows any user to reload their recycled cartridges reliably and consistently in only a minute or so.