This was my first attempt, so it counts as practice. The goal was to make a pie carrier, so a pie wouldn't slide around. I thought I was making it too big. But it turned out way too small. It's also a little wonky. Still, there were some learnings. I made this using 3/8" cotton rope.
When practicing, I used some cotton thread I had sitting around. Poor quality, broke multiple times. So I changed to a better quality cotton thread meant for machine quilting. Worked perfectly, did not break even once.
Despite not being the size I wanted, this did make a nice rope bowl. It seems quite strong. It takes a little practice to make, but isn't difficult at all.
The braided cotton cord that I ordered came, so I made another. This time, 1/4" diameter. The rest was the same method.
I thought the 1/4 inch was more difficult to sew well, because the narrower diameter was not as easy to see under the presser foot. Still, it worked fine and the final product was a very nice rope bowl. I think it worked perfectly.