Caps of various sizes and of any make have been in the market since a very long time. Local manufacturers have tripled in number over the last few years. Through the number of factories have increased by leaps and bounds, quality bottle closures are becoming very difficult to procure nowadays. The high cost of manufacturing good caps to meet the demand of the market now poses a big problem. However, in lieu of all this, several methods of production to create different grades of materials to make caps are now prevalent in the market. Plastic bottle cap closures come in a variety of style and colors. These caps come packed in small kits or in bulk packs, if bought from wholesale dealers. Each cap comes with a manufacturing code to signify the production line and the make for the company to keep track of its product inventory. The plastic caps are generally in four major categories: smooth, brush, and dome. The more advanced small plastic bottle closures have additional features like child resistant, tamper proof, tamper evident, etc. Phenolic lined caps tend to be hardier and last longer.

Wine bottle closures are also extremely popular in the market. Their entry is very recent and a lot of studies have gone into their relative effectiveness because preserving wine is very important due to its cost and also to retain its flavor and taste over a longer period of time. Screw caps were in vogue for a very long time in the market till these entered the consumer domain. Cork closures have a very long tradition and their usage on wine bottles now signifies that these wines are inferior and not of an acceptable quality. Generally, there are two main materials that are used to manufacture wine bottle closures. They are made either of metal or cork. Good quality natural cork is high to come by these days. Moreover, cork tens to affect the taste and quality of wine by making it dull and unfit to drink, better defines as the ‘cork taint’ by manufacturers. To address this problem, an alternative of synthetic cork was also considered. But, this kind of cork tends to leave a ‘plastic taint’ that many consumers might find extremely difficult to deal with and find it extremely unsatisfactory. Keeping all the above factors in mind, we have now seen another solution to the above problem and that is the experimental use of metal in closures. Metal caps can be produced easily in bulk. They are extremely efficient in sealing the wine and keeping it safe for extended periods of time. Most wines are not bought in bulk because most collectors of wine are experienced connoisseurs and each and every bottle added to their shelves are extremely expensive and are a matter of utmost pride to their owners.