Jelly molds do not require any lining. Simply pour the liquid jelly solution into the mold and allow it time to set. Silicone molds are easier to work with for jellies as they can be twisted and pushed to get the jellies out. Metal molds tend to be harder, but you can use a jam knife, a thin spatula or even toothpicks to loosen the jellies from the molds before tapping them out.