I ran across this video by pamperchu on YouTube recently. Basically what the video shows is technique that involves taking a small diaper, ripping out all the elastic, and stuffing it inside of the shell of an adult diaper, so that the small diaper is underneath all of the padding and sodium polyacrylate (super-absorbent gel) of the larger diaper. I tried this yesterday with a GoodNite as the stuffer and an Assurance as the stuffee. The result? Holy hell.
My little custom-made diaper held 5 wettings before I finally got it to leak (and you could tell it was ready to leak, it was huge). I didn't need to change or use the toilet for about 21 hours. I was completely amazed. I have tough skin so I know for a lot of people this is too absorbent to be useful, but this eclipses the absorbency of Dry 24/7. I've yet to try Bambino but based on reports I've seen, I think they don't even hold this much. And I made this thing out of two store-bought, low-grade diapers. The cost was about US$1.50.
By the way, GoodNites are extremely absorbent diapers. They're just poorly designed, so they leak easily unless you're, well, a kid. There's a lot of gel in them.
Anyone tried this? Did it work? (mm3 told me they sagged for him) How much did your custom-made diaper hold?