Use the Bottle Bit to sand down the edge of your bottle after you cut it. The Bottle Bit is a sturdy metal canister that attaches to your 3/8 inch power drill.

It comes with a foam barrel and several pieces of foam padding. This padding is used to get a snug fit for any sized bottle up to 3 1/4 inches. This will work for smaller soda or beer bottles as well as standard sized wine bottles.