Oh ... I never use the bottles.
10-pack of .10 oz superglue tubes from Harbor Freight Tools ... $2.99 a pack.
One tube typically lets me do a single 2-barrel pen ... from gluing in the brass tubes to all the layers of finish. I never have to worry about an expired or gunked up plugged bottle, ect .... and if I forget to cap the silly thing, it's a minor annoyance instead of an expensive waste.
I got that advice from Adam Savage ... he loves the little disposable tubes too! :)