How do you drink coffee in a cafe?

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How to use coffee bags correctly

I found that after many friends and guests got coffee, they asked me if they sold golden hoop sticks or self-sealed bags. Our coffee uses a combination of one-way valve and sealing strip (tin tie). This combination is actually very convenient and does not require additional sealing aids. It is just that many friends do not use the sealing strip properly, or think that the sealing strip will be useless after it is opened.