A Glue Tip Go to the store and buy some small round Zip-lock storage bowls. The ones with the blue lids. Get the bowls that are about 3 inches around. The bowls are made of quite thin plastic that is fairly flexible. Mix your epoxy in them. When your done, let the un-used epoxy harden over night. The next morning you can flex the bottom of the bowl and the hardened epoxy will "pop" right out nice and clean. The bowl is now ready to be used again!