Ah, the art of getting a urine sample! I used to be a vet tech and lots of people would just bring their dogs in and we would get it for them. But if you want to do it yourself, just get a clean container (we used plastic tupperware/rubbermaid) and stick it under them while they're peeing! I think the short, wide containers work the best. And as someone else said, you should get the urine to the vet fairly quick because it should be fresh. And yes, your neighbors/family will think you are crazy for chasing the dog around with a tupperware container while shouting "Come on, PEE"!
Bridget, Summer, and Duke
Bridget, Summer, and Duke