Thanks for the ideas, you guys!

She always does her biz outside, so I hate to encourage her to go in the house, you know?
However. Her previous owner used pee pads when she was a pup, until she was a year old and I got her. She's 5 now, but maybe Zo will remember?
I was wishing this winter, during all the horrendous weather, that she could re-learn pee pads for emergencies. It's awful taking her out during snowstorms and such.

Now seems like a good time to try a little reminder lesson, huh? This urine sample problem might work out to be an excellent thing for the future. I'll give it a try Monday, so if it works I can get the sample right to the vet.
I'll let you all know how it works out. Thanks again everybody...