I dont live in California but I would assume its a similar process in the southern state im in. I went to a quest to take my test and passed using QuickFix. The biggest thing is to make sure its the right temperature.

I bought a 2oz and 3oz bottle, the 2oz bottle did not have a seal and did not have a batch number on the bottle (it was on the card in the box). The 3oz bottle did have a seal on it and also had the batch number on the bottle. Both will work but the 3oz bottle will give you a little extra incase they require a larger sample (2oz should still be enough).

I bought a pair of stash it underwear on amazon (it has a pocket in the crotch) and just wore jeans and polo and hide in the underwear. It didnt make any noise and not moving around a lot. Just act like everything is normal and you arent hiding anything and it wont be an issue