These are very pretty. You won’t be able to drink out of them, or put water in them with this method. However, if you use this method on the outside they will make pretty vases. For a more permanent solution you can use enamel paints (Americana makes Crystal Enamels that give this same look but can be washed). Check out these lovely Tinted Mason Jars in Rainbow at Momtastic.
By Amanda Formaro