Bottle caps are manufactured in three construction forms. Twist locks, crown corks or a cylindrical cork stopper offer airtightness and are relatively easy to open. However, without the right tools it can be difficult to get to the contents of the bottle. In this case there is usually an alternative.
Three types of closures are used by bottle manufacturers to seal the bottle contents airtight and transportable:
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A cap-shaped screw cap can be made of sheet metal or plastic. Its thread on the inside turns onto the mating thread on the bottle neck. Tightness is created by sufficient turns and, if necessary, a tight insert in the cover.
The crown cork consists of a sheet metal disc with 21 points in the standard version. The underside of the sheet metal disc is coated with a sealing insert made of elastic plastic. When pressed on by machine, the prongs bend around the upper bead on the bottle neck. Not widely used in Germany, there are also screw-on crown corks in other countries. When they are opened by lifting them off, the beads on the neck of a glass bottle, which form the mating thread, break.
Corked bottles, mostly wines, can have a natural or plastic cork
to be introverted. The length ranges from 38 to sixty millimeters. They are pressed in and must be spread when opening and pulled out of the bottle neck in a vertical direction.
Common opening tools and bottle openers
Screw caps are opened by turning them counterclockwise. A cloth / rag can be used to improve the application of force and to prevent slipping. If there is strong resistance, it can be carefully unscrewed with a pipe wrench or an English wrench.
A lever tool is required for crown corks. The classic bottle opener consists of a metal ring that is tilted onto the crown cork. Classic improvised opening aids are lighters, hammers, screwdrivers, wrenches or other still closed bottles. A hard edge can also be used to open it. One of the protruding prongs is placed on the break-proof edge and the blow on the top of the crown cap "blows off " the sheet metal disc.
A spiral corkscrew is required to uncork a bottle. It must be screwed in vertically against the pressure of the cork. After the cork is completely pierced, it can be pulled out with even force. In an emergency, a cork can also be pushed into the neck of the bottle.
Special features during the opening process
When opening every bottle with carbonated content, regardless of whether it is made of glass or plastic, a hissing sound is the proof of leakage.
Some twist locks are provided with an additional locking ring. It is attached and connected to the lower edge of the capsule by individual tabs with perforations. When opening, these rings sometimes rotate with it and have to be cut off with a knife.
If a cork crumbles or cracks, reattaching and screwing in a spiral can help. If crumbs fall into the drink, it needs to be sifted.Tips & Tricks If your bottle cap is unruly, you can use the laws of physics to help. Changes in temperature, such as slightly warming or cooling the bottle, can make the closure run more smoothly.