Above is a picture of a cardboard cover in a gift bag instead of tissue. I recently saw a gift like this and thought it was such a clever idea. At the top of the cover it had a slot to place a card. To me the design had everything, form and function. It covers the gift better, keeps the bag's shape, and prevents the card from getting lost in the tissue. Simple directions below to make a gift bag cover.
cardstock - size depends on the gift bag
glue or double sided tape
Follow diagram to make the cover