This is an excellent idea for someone (like me) who appreciates creative ways to diy without the need for expensive and/or heavy duty tools and equipment. What for? To make cool lanterns for your garden or your dinner table - put a short candle inside, or put some candle gel and wick inside. If you use coloured glass bottles - green, brown, purple, red, blue, etc., you get varied coloured lanterns. Just an idea.