Cork is a material that grows as the bark of the Cork Oak tree. More than half of the world's cork originates in southern Portugal.

The bark of the Cork Oak tree is harvested about every 9 or 10 years, and it is allowed to dry for 1 to 2 years. Next it is boiled to remove any toxins or other harmful agents, and then it is graded and cut. After a final cleaning and drying, the cork is sorted and ready for use.

Cork is most commonly used for wine bottle stoppers, but it can also be found in bulletin boards, flotation devices, and floor tiles. Worldwide cork demand is on the rise primarily due to increasing wine consumption. Ramping up cork production, however, is a lengthy process since cork trees can only be harvested about once per decade. Synthetic cork has been developed to satiate the growing demand.

What is a Corkage Fee? A Corkage fee is a fee levied by a restaurant to serve a bottle of wine brought in by the customer. The fee is intended to compensate the restaurant for all of the following: opening the bottle, serving the wine, cleaning glasses, and perhaps most importantly, lost revenue from wine sales. Corkage fees vary from restaurant to restaurant and although they can be very high, they usually hover around $10 to $15.