I also want to ask, I found the vacuum bag on Taobao. It seems to be a plastic bag. Do you need an air pump? If you need an air pump, it’s too professional, or just seal it? For example, a happy lunch box?
you need an air pump and a household vacuum cleaner. Manual is almost impossible.
Vacuum bags are evacuated when packing things. Before putting anything, it must look like an ordinary plastic bag. Air extraction tools are necessary.
is it called vacuum without pumping?