"Decorative boxes" refers to boxes that are designed and made to be visually pleasing and ornamental. They are used to store or display items while also serving as a decorative item themselves. Full definition
Pack chocolate bark in decorative boxes to give as delicious gifts. (cookingchanneltv.com)
You can pack all these products in decorative boxes, tin and baskets. (fb101.com)
As a result, we have the Harry Potter Ultimate Edition, the first in a proposed series of eight, all collected in highly decorative boxes with the year of his attendance at Hogwart's marked on the side. (justpressplay.net)