Make glowing liquid easily by using tonic water that contains quinine. Quinine is a chemical that reacts to UV light. Tonic water can be found at almost any grocery store and it's cheap to buy. The more black lights you add the more the tonic water will glow. You can make ice-cubes with tonic water and use it for your drinks. You can also make glowing decorative shapes. It's a simple and fun experiment. Give it a try!