These are colorful, anodized aluminum bottle openers. They also happen to be a great key chain. Keep your keys on one of these lightweight, high-viz babies and you'll have a good chance of being reunited if you should part ways.
It's always nice to have a backup pair of shields on hand, or face. Sometimes you just know you won't be returning home with all of your things. Better to have loved and lost these than your wallet, your phone, or your Maui Jims. Don't let the sun send you scurrying like a cockroach for the dark corners. Assorted colors, taste the rainbow!