The Non Slip Loop Knot. Superb. The strongest loop knot you can tie. Used by big game anglers worldwide. Easy to tie, far stronger and more reliable than the old fashioned strangulating figure eight knot that can substantially weaken line.
Basically you just put 2 CDs together - shiny sides out and set on an upside-down oven-proof cup -- oven at 375 degrees for about 10 mins or until it droops down over the cup. Mine turned out silver on the inside, with the side exposed to heat a glittery white.