Yes, Assumpta's human holds the strip under her, or catches a mid-stream sample in a cup. Then again, I have always made sure to frequently walk past the litterbox and talk to or touch Assumpta while she's doing her thing, so it wasn't TOO bizarre for her when I started doing samples. I haven't met many cats who will pee in a cup...Assumpta is a very patient kitty...also stubborn.
She refused to use the No-Sorb. The first time, it took me 8 hours to get a sample, and even then she stood on the edge of the litterbox to pee and ended up tipping it over on herself. The next time, I finally gave up after 14 hours of Assumpta walking over, staring sadly into the litterbox, and meowing at me in a pathetic way...so I put her litter back, sat down next to the box, and used the no-sorb cup to collect a sample...took her 30 seconds after the litter was back in the box, and at that point, I probably could have set off a bomb next to the box and she would have just kept peeing (relief was evident on her little face after holding it that long).
We're still stuck at 7.0+, and I will probably have to find another way to give her methionine (triple-fish compound was too oily). I think they have chewables that can be crushed into food. It's not like I can put her on permanent daily metronidazole.
Edited to add: My technique is to wait until she starts, then gently wave the strip in roughly the area where the stream should be (it's probably going to be lower than you think). Occasionally I miss, but I usually manage to get something. My pH strips come in a roll so you can tear off as long or short a strip as you need.