A filling system for delivery of at least one substance to a covering is provided. The filling system comprises at least a funnel shaped container and a plunger. The funnel shaped container includes a scoop portion connected to a hollow barrel. The barrel is configured for insertion into the covering, the plunger adapted for pushing the at least one substance down the hollow barrel into the covering. The filling system can also include a spatula. A kit including a funnel shaped container, a plunger adapted to push a substance down the barrel of the funnel shaped container, a spatula, a retainer for keeping the kit elements in place and trays for protecting them from the environment are also provided. A method of use utilizing the filling system is also provided.