HOW TO TIE: 1) Double a line and make two twists. Bring the end loop up, then weave it back down through the standing part of the line. 2) Rearrange the knot by bringing a lower loop up underneath. 3) Bring the next lower loop up above the knot. 4) Put the bottle's neck through the knot, work the lines tight, and slip the standing line through the end loop for security.