Drug stores handle small plastic dose cups that work perfectly. Graduated in cc, tsp, tbsp, oz or drams, they are easy to work with. E.g., if you need just 15 cc of epoxy, with a 2:1 material, make a felt pen mark at 5 and another at 15. Fill to 5 with hardener, and in the same cup, with the hardener still in it, fill it with resin up to 15. Stir it well for two minutes and apply it. When finished, there is always some left in the cup. Leave the mixing stick in the cup overnight. The next morning, the epoxy will be cured and the stick is a nifty handle for pulling out the extra epoxy, leaving a clean cup for reuse. The epoxy won't stick to the plastic. Clip off the tip of the mixing stick, and you can reuse that too.