thanks for the reply Relle9, I have made candles in tins successfully, but was unsure of the wick sizing for cups ...since the sides are not straight.. I was afraid if I went with the diameter of the rim it would get too hot as the candle melted down and the sides got closer to the flame..did not want a dangerous situation..I think I will start with a wick size for the bottom and work up..I have used the Ecosoya and Golden Brands...I just have to work up the courage to try...