If it is a plastic bottle, cover it, tighten it and try it upside down. No leakage, no leakage.
If you use a plastic bag, you'd better find something that can help you heat seal it so that it won't leak. Of course, when packing them, try not to let air in them. The outside is packed in a hard box to avoid being squeezed.
Of course, upstairs, it is good to use fresh-keeping boxes, but the cost is too high, a box of dozens, not cost-effective Of course it doesn't matter if you give it to your family.
1, bacterial diseases: mostly used in respiratory tract diseases, such as pleuropneumonia, pig lung disease,