here's a craft that I have made - I used the chinese/japanese style tea cups for my candles but these european ones with handles work well too.
These dainty teacup candles offer a way to reuse old candles. We've used this technique with seashells, sake cups, and more.
Candle How-ToIn a small pan set over a large pan of simmering water, heat partially burned candles until melted. (Clip a candy or candle thermometer to the small pan; keep temperature around 185 degrees.) Remove old wicks with tongs.
Cut a piece of wicking to 2 inches more than a teacup's height. Clamp one end to a wick sustainer; tie the other end around a wooden skewer. Dip wicking and sustainer into melted wax to coat. Remove, and press sustainer to cup's bottom. Pour wax into teacup, stopping 1/2 inch below cup's rim. Let stand until set, about 1 hour. To even well in center, use another skewer to prick a circle of holes about 1/16 inch deep around wick. Pour in melted wax until surface is 1/4 inch below the rim.
from: Martha Stewart Living, Volume 150 May 2006 http://www.marthastewart.com/268488/make-a-candle