Frozen food usually comes as cubes in a blister pack. I just keep them in a plastic bag in the freezer. The bag is only needed as I have a squeamish husband. The cubes are a bit too big for one feed so I use an old kitchen knife to chop them up. Then I thaw them in a bit of tank water in a plastic tub. Then add them to the tank. I use an old fish food tub to keep the unused half cube in till next time.
My honey gouramis like bloodworm, daphnia and brine shrimp, which I feed on a rotating basis once or twice a week.