What Is the Purpose of That Little Disc Under a Plastic Bottle Lid?
By now you’re probably marveling over your little discoveries of all these things that serve so much purpose that you never paid any mind to, right? Well, here’s another one!
Do you know that little disc under the lid of plastic water and soda bottles? They serve a special purpose as well. You might find that removing them doesn’t cause a problem. The bottle still closes fine, right? Turns out, they create a seal that keeps everything in the bottle – both liquid and carbonation. Without that little disc, your soda would go flat very quickly!