I use these IKEA SKUBB drawer storage boxes for my bras, undies, socks, and other smallish items. My bras are fairly pricey so I'm careful about laundering and storing them to maximize their longevity.
http://www.ikea.com/us/en/cata...../00192631/#
I think the advice not to store cup inside cup pertains to molded bras. I'm currently down to only two molded bras since I much prefer a seamed, underwire bra which is fine stored cup into cup in an upright position with the wire at the bottom. (That is how the bra boutique stores all of its stock.) I usually tuck the matching undies into the cup so everything gets stored as a set. Extra undies are stored in one of the smaller boxes.
I think the puckering and wrinkling on molded bras is more a laundering issue with the foam. Years ago I tried one of those expensive, Oprah-recommended, Dream Tisha Le Mystere bras which become horribly dimpled after only a few washings. The poor fit and puckering turned me off molded bras.