I bought these refillable printhead and seal cleaning cartridges for my Canon MX922. I soak them in isopropyl alcohol and do a thorough cleaning once a month until all the ink is washed off the heads. The orange plastic clips on the bottom of the cartridges and the rubber stoppers on the top allow me to store the alcohol cartridges inside for the next month. My only concern is that the orange clips have a white nylon(?) gasket. snaps into place, closing the hole at the bottom of the cartridge to keep the alcohol from spilling. However, these nylon spacers are loose and will not stay in place. Next time I use Loctite I'll put a drop on the pin of each spacer before inserting them into the clips to permanently secure them.