I realize you're supposed to use your first void of the day when testing, which I had done previously 3-4 times, but I just wanted a gauge on what my piss would have looked like in their hands.
This is not an accurate "gauge" to go by because THCA levels fluctuate daily and timely due to fluid consumptions that occur during the day as a normal part of staying hydrated. The fluid consumption would skew the results because the THCA concentration can get diluted to the point where a urine sample would register a negative. The dilution phenomena is only temporary - once youve urinated out the fluids that were consumed, the bladder is replenished with fresh THCA-laden urine and thus the donor would resume testing positive for THC.

Thats why it is stressed that anytime you test yourself, you always use the first urination of the day when THCA levels are at their highest. By using the first urination, you are testing yourself under the worst-case scenario. And if you are routinely testing negative under that "worst-case scenario", then its a safe bet that there will be no detectable amount of THCA left in the body to fluctuate.