Synthetic closures for containers; corks, stoppers of natural cork; stoppers of cork imitation; stoppers of cork containing natural cork and cork imitation; corks for bottles; natural corks for bottles; imitation corks for bottles; corks containing natural cork and imitation cork for bottles; stoppers of cork or cork imitations for jars and bottles; stoppers of cork or cork imitations for bottles with delayed release oxygen insert cartridges and tablets; synthetic polymer caps and stoppers for use as closures for bottles; synthetic cork or cork imitation stoppers for bottles; wood barrels; non-metal barrels