Back to Party Food Coloured Lemon Slices Coloured Lemon Slices Share with your friends: If you would like to have a punch at your next special event, here is a fun idea that will make it look great. Soak some lemon slices in food colouring and then freeze them and add to your punch. Written By: Jarrod Brake Find us on Google+ to read Great Inspiring and Helpfull party supplies articles.