Depending on your technique of applying lash and brow extensions you might find it easier to work with a jadestone or a glue ring.
It slips onto a finger of your choice and you can use this to keep the adhesive within easy reach.
Available as pack with 10 or 100 x glue rings.
I have used the glue rings for a few years now and they are great. Fit well as not a solid ring, bond last well when completing a set of lashes