Our Brass Slide Under Drink Cup Holders are tapered to hold your drinks secure without spilling. These "Vegas Style" cup holders simply slide under a table's padded armrest. Additionally, these slide under cup holders will work standalone - even without tucking them under anything. Because this cup holder is constructed from Anodized Brass to retain its luster and is both durable and rustproof. Our standard size cup holder fits standard glass bottles and aluminum cans.Wrap 1 " wide masking tape around the outside of the cup holder to achieve the desired diameter. We recommend you wait until you receive the cup before drilling your mounting holes.