Metal bottle caps, the kind that come from glass soda pop or beer bottles, are notoriously difficult to recycle. The fact that they are tiny and have sharp edges means they can lodge inside and destroy a recycling plant machine. If found inside a recycling bin at a plant, they are often tossed in the garbage. With just a little time and effort, you can recycle or reuse them yourself so that they do not fill up a landfill.
Create crafts with the bottle caps. You can make belts, suspenders or necklaces with the bottle caps to reuse them.
Gather and sell the bottle caps. Many people purchase bottle caps for collectors' items or to create crafts. Sell them at yard sales or online. You can group them by brand or type, or just gather a large amount together and sell them as a group.
Contact the Bottle Cap Lure Company (bottlecaplure.com). They purchase metal bottle caps to make fishing lures, and they may be able to use yours. Contact them before you simply mail your bottle caps to them.