Food Saver Caps seals 3 inch and 3 3/8 diameter food cans locking in freshness and odors. After opening your can you can seal it airtight to extend the life of your leftover foods and protect them right within the original can, without the need to use other containers. Plus you can easily re-shake the remaining soup or sauce within the can if the food had settled and enhance its consistency and taste, without the worry of wasting the rest of the formula and or spilling. Reusable, durable plastic provides 1000's of uses, dishwasher safe and MADE INTHE USA