The Disk Under Bottle Caps Is There Is For Doing This
By now, you’re probably giddy with delight at all the things you’ve discovered that serves such a useful purpose but to which you’ve never given any thought, right? So, here’s another one for you!
Are you familiar with the small disc found under the lids of plastic water and drink bottles? They also have a specific function. It’s possible that removing them won’t cause any issues. Isn’t it true that the bottle still closes properly? It turns out that they form a seal that retains everything – both liquid and carbonation – in the bottle. Your drink would quickly get flat if it didn’t have that small disc!