BOTTLE CAP-Vintage Collection: Double-Sided Bottle Caps. These liner-less bottle caps are great for all of your crafting, jewelry, and scrapbooking needs. Each one has been painted on both the front and back sides giving you multiple design options. They have an internal diameter of 1 inch and a height of 3/16 inch. Each package contains fifty metal bottle caps (five each of ten colors/designs). Imported.