Mark Newly Added Goods with a 'NEW' Label

[KineticDog]

Hi there. I'm creating a shop for my game that could update new goods according to game progress. I'm implementing it by creating multiple shop processes and change shop according to game progress variable. Now I just want to make the system a little bit better, by giving 'newly added' goods a 'NEW' label at first entry of the new shop.
I would like to know if there are any good native approaches or plugins that could implement this. Thanks in advance