Why do some US group receipts show the packaging fee and some do not?

Meituan's receipt shows that the packaging fee is not shown, because the store packs it for free.

According to the public information about the inquiry, in the Meituan platform, different invoicing methods will be carried out according to the activities of different stores, and meals will be served in shops that provide free packaging services. The small ticket will not show the packing fee, and the small ticket of non-duty-free shops will show the packing fee.

Meituan was established in March, 20 10, and its business includes take-out online ordering, hotel reservation, travel group purchase, air tickets and train tickets.