'Gift' with purchase, 1 per item type/SKU

Shopify Apps
3

It can be added in the storefront, I don’t have an issue if people see something like “complimentary tasting notes” added to the cart, and we have a product set up called “tasting notes” that get added. I just need to make sure that the quantity it adds is correct, and that there aren’t other pop ups associated with it e.g. don’t want pop ups telling customers to “claim their gift”. Just something that auto-adds, and gets the quantity correct.