The cork covering capsule, which usually contains an imprint indicating the wine or producer. This capsule is the uppermost part of a film that closely encloses the bottle neck. This will make the cork before drying out, the pollution with for example bacteria as well as infestation by the Korkmotte and their egg laying protected and also the OTR rate (Gas exchange) between the contents of the bottle and the outside world or access by oxygen slowed down. Last but not least, it also achieves a decorative purpose.
The capsule can be made of different materials. The formerly toxic lead capsule, which has been belittled as tinfoil capsule (originally a lead silver alloy), has since been banned in viticulture. Today, the capsules are made from neutral, non-toxic tin (also known as tinfoil), the much cheaper aluminum that is not so close to the bottle neck, but also, above all, with simple wines made of plastics, such as PET. polyethylene. PVC or PVDC manufactured.
Before the cork is pulled, the film must be cut open all around with a capsule cutter (picture on the left with the four round rolling knives in the cutting sheet) and then the capsule hat removed (picture in the middle). However, there are also foils with a flap that can be used to expose the capsule hat around and then remove it (arrow in the picture on the right). For sparkling wine bottles is between Agraffe (Wire mesh) and cork a metal capsule. Collecting these objects sought after in the scene is called Placomusophilie designated. See also other alternative bottle cap shapes below closures as well as under Weingenuss,