So I got some Tena Super Briefs and was very disappointed at the quality, specifically the capacity. I got some Rite Aid pull-ups and I thought it would a good idea to stuff the brief by extracting the material from the pull-up. I did this twice using two pull-ups.
Well, the thing is that I had actually cut the covering inside the brief to expose the material, and I simply stuffed the padding from the pull-ups inside. I tried to seal it shut, but I came to realize that the amount of swelling this improved diaper would experience burst through the cuts I made for stuffing, and so all the absorbent material was all over the place inside the diaper. Luckily I could contain it before I took it off, but when I did, the cleanup was god-awful.
So if you ever think that this is ever a good idea...it really isn't. I only tried this because it seemed that using those pull-ups as stuffers would not work; they swell quite a bit, and I don't think the liquid could make it past the gel after a while.