Brix CanLock 

CanLock covers opened beverage cans to keep insects, dust and dirt out no more pesky insects in your soda; Set of 3, 1.75-inches
Attaches quickly and easily under beverage can pull tabs-simply rotate to open and drink, rotate again to close; use it to open pull tabs, too
Easy for anyone to use, including kids and people with arthritis-no sharp edges
Compact and handy for in your kitchen, car, garage, boat, camper-goes anywhere a beverage can needs to be opened quickly and easily
Made in Denmark; durable and reusable; hand wash recommended