Sometimes memories aren't enough . . . even when they involve peeing on a stick. Expectant mothers who can't part with their positive home pregnancy tests consider them keepsakes. And now, one manufacturer is offering the mamas-to-be a case to store the treasure in (with proof of purchase, of course!). According to a study conducted by E.P.T., the urine strips ranked right up there with items like ultrasound photos and hospital wristbands in terms of things mothers cherish. Since the test isn't normally something parents display on the mantel, most people stored theirs in a plastic bag. What's your opinion?