A cool trick I learned from Derrick LaugLaug (@dllcustoms on instagram) is to create a dump mold for your leftover resin. This way you are getting as much resin as possible out of the mixing cups which makes them last longer, and you get another item to add to your stock! I sculpted my little logo and glued it to a jar lid for my dump mold. Works great so far!

CrowPickle dump mold