Burn it up, baby

A German glass cake mold from the 60's will be the perfect stand for my Christmas decorations. I will fill it with colourful bubbles that will look amazing when light shines through the glass. After Christmas I might use the mold in it is original use for baking cakes, or not - I don't much like hand washing the dishes and I wouldn't dare to put the mold in the dishwasher.