I buy in bulk. I put them All in individual ziplock bags, into a freezer bag. Each week I take one out let it defrost at room temp for 4-6hours (usually while running errands). Then I put the entire bag into hot water for a few min(10-20min) and then feed. Her rat magically appears though since she is out of her enclosure while this is happening lol. Shhh don't tell he i put the rat in there...it will spoil the magic!