Set of 20x precision tips will allow you to dose the cyanoacrylate glue in controlled quantities while protecting the original nozzle of the CA bottle. After attaching a precision tip you can leave the tip in position without having to close the glue bottle for weeks as air will not be able to enter through the precision tip thus favouring its conservation.
Glue tips need to be fitted tight on your glue bottles. Press the glue tip on with some pressure, so that it seats very tightly. Most of Cyanoacrylate Adhesive bottles will accept these tips, but to be 100% sure, use ours.