I’ve finally worked out the recipe:
Take two glow sticks, one orange and one yellow. Crack to start the chemical reaction, then cut in half and empty the contents into a cocktail glass. Remove the ends – they double as straws.
Add some boiling water to really get the chemical reaction going.
Add a few drops of washing up liquid to break the surface tension of the glow juice.
Blow through the plastic tubes to generate a foamy head.
Inspect yourself in the mirror and discover you have glowing lips.
DO NOT DRINK!