I keep a glass mason jar handy. Urine is best consumed on an empty stomach, first thing in the morning, 1 hour after fruit, 4 hours after starch vegetables or meat.
I catch the whole thing and drink until I run out of the one breath. That fills my stomach, you get maximum dose, plus the breath measure changes all the time. The excess urine is used for urine rubs, aged urine input or garden fetilizer.
I do this everyday, and have for 4 years-ish. It is simple.