drinking glass (thrift stores have these for cheap mine was 10 cents)
dry erase markers and wet erase markers
all you do is color the markers n the glass and then put a candle in and light. So easy and cheap and if it is one of your "good" glasses then you can actually "erase" it off with either a dry cloth (dry erase markers) or water (wet erase markers). This isn't that good of a pic but you can get the idea.
So if you want to join in please read the rules...