I'll give you points for the elegant part because formal dresses are hard to add pockets to. But my bootie is currently sitting in a pair of form fitting flare jeans with functional sized pockets. There are pockets added to workout leggings to at least carry phone, ID, and keys in. I also have some cute skirts and dresses with functional sized pockets. I don’t want cargo pants size pockets, but at least enough to hold my ID and some cash without fear of losing them.
These things do exist, they are just hard to find because companies don’t manufacture them. Most women I know would buy pants with functional sized pockets even if they didn’t use them and pretty much every woman I know has complained about our barely able to hold a chapstick sized pockets.