I'm trying to figure out a way of adding the option to 'add on' a child product on the parent product page.
See here: https://jungleculture.eco/collections/zero-waste-bathroom-products/products/safety-razor-for-women-m...
They give you the option to choose the parent product (razor with choice of colour) and then also 'bundle' or add on another product (razor stand).
Is this a standard Shopify feature, or would this be done using an app?
Thanks very much,