I used to keep candles in a glass bowl of water in case the glass ever cracked but if this happened, I bet you I would have had a massive mess of flames all over the place! I can't light candles anymore cause one of my cats is having coughing issues with scented stuff but I will make sure my family knows about this. I know my mom has one of those metal bell looking things on a stick to put candles out, I think they are called snuffers?