Abstract: A closure for a container having an open top surrounded by a container wall. The closure includes a top wall from which a hollow insert depends for reception within the opening of the container and further includes an outer skirt that depends from the top wall for releasably engaging an outer face of the container wall. The insert has a first seal and a second seal for sealingly engaging the inner face of the container wall. The second seal is formed upwardly of the first seal, and a channel is formed between the seals to prevent leakage through capillary action.