We make bibs as part of our Sewing Ministry (ESAP = Every Stitch a Prayer). We use large, thick towels for the body of the bib and use two layers of cotton or poly/cotton for the neck opening. They are scraps from the dresses we make for children overseas. We opted to not make the crumb pocket because the smooth terry cloth is better for washing their face at the end of the meal if necessary.
I have used the vinyl tablecloths to make bibs for our disabled grandson. I don't recommend them as they tear at the stitching line. The terry cloth is great. You can get 2 or 3 out of a large towel if you use the cotton fabric at the neckline. This also makes a colorful bib.