As you know we hand pour every candle here at Rachel's Candles And More. As we are pouring, we sometimes have scented wax left over from each batch that we pour. Instead of wasting this wax we pour them up in our 4 or 8 oz. jars. Each candle jar can have as little as 1 or up to as many as 5 layers of a different scent. We do not mark them so they are a "surprise" to you as you burn them but with each layer you get to experience a different fragrance. Some jars may come with or without a wick. The ones without a wick are recommended for warmers/burners.