Yesterday, mum got a bracelet with her blood type information on it. (We banked blood, so that if the surgeon decides she needs some, they'll have it ready to send into the O.R., and they'll match the bracelet up to the blood to make sure they have the right type.)
Since she got it so far in advance of the surgery, they advised her to cover it with saran wrap so she could shower.
However, Papa didn't think that would do. The Walker Method. Please observe the "high cost sealing gasket" (aka "rubber band") courtesy of the News-Gazette.