I have found some awesome mason jars at the thrift stores. I am planning on using them in my centerpieces some how. I was originally thinking about putting candles in them (votives most likely) but really would like to be able to use them post weddings for flower vases, drinking glasses, and general household use (mason jars are soooo cool!) But I was wondering if anyone else has used mason jars with candles and if the wax in them was hard to clean out to be able to use the jar afterwards?