When filling in the specification column of the invoice, filling in "packaging" means that you are buying packaged goods, that is, "packaging". When some commodities are sold in bulk, such as wine, mineral water, garbage bags, etc. Manufacturers often pack a batch of goods into a box and indicate the specifications and quantity on the box.

For example, if you buy a box of 500 ml mineral water, the number of packages is 24 bottles, and the column of specifications can be filled with "500ml/ bag ×24".