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the paper on it will generally be cellophane or chicken skin paper (because it is impermeable and has the effect of oxygen isolation, which can slow down oxidation), that is, it will be cut to a predetermined size, covered on the bottle mouth, and then wrapped and fixed with elastic rubber rings for sealing
but I believe that under this layer of paper, the bottle mouth may still be sealed with plastic material.
for yogurt, there is a square towel or square paper on it. It’s OK to use a set of rubber band.
long and funny articles, not a lot of them