Hartz® Pet Food Can Savers. Fits 2 sizes. Hartz® pet food can savers lock in the freshness of your pet's food: Airtight seal locks in the moisture and the smell. 2 sizes to fit most food cans. Easy to clean plastic with lift tabs to easily snap on and off. Great for pets who do not finish a whole can in one serving. www.hartz.com. Hartz® and other trademarks are trademarks of The Hartz Mountain Corporation.