My mom and sister found me the coolest bottle cap necklace at Sagrada in Oakland. If you're looking for an East Bay "day trip", shop at Sagrada and grab lunch at Bake Sale Betty's. Trust me on this one! But if you can't make it to Oakland to browse bottle cap necklaces and nibble on brownies, then check out this website. Super selection and a discount offer is running right now if you purchase more than one. After all, it might be kind of difficult to select just one.