1. Exhaust
These small holes can be used for exhaust when fitting caps. In the process of mechanical capping, if there is no small hole for exhaust, air will form an air cushion between the bottle cap and the bottle mouth, causing the wine cap to fall slowly, affecting the production speed of the mechanical assembly line. Moreover, during the rolling of the cap (tin foil cap) and heating (thermoplastic cap), residual air will be trapped in the wine cap, affecting the appearance of the sealing cap.
2. Ventilation
These small holes are also ventilation holes for wine, which can facilitate aging. A small amount of oxygen is beneficial for wine, and these ventilation holes are designed to help the wine have the opportunity to come into contact with air when completely sealed. This slow oxidation process not only allows wine to develop more complex flavors, but also extends its lifespan.
3. Moisturizing
We all know that in addition to paying attention to light, temperature, and placement, the preservation of wine also requires humidity. This is because cork stoppers have shrinkage properties. If the humidity is too low, the cork will become very dry and the sealing will deteriorate, which may cause a large amount of air to enter the bottle and accelerate the oxidation of the wine, affecting the quality of the wine. The small hole on the bottle seal can keep the upper part of the cork moist and maintain its sealing performance.
