Of all the commonplace objects one could redesign, few would consider rubber bands. But one company felt they could be improved, and thus we have these Alco Rubber Sealing Rings.
"These rubber sealing rings with hooks are used to bundle strands of wire, rods or tubes. By virtue of their durability in low temperatures they are also suitable for fastening refrigerator bags. The little built-in grips make it easy to attach and remove them."
They're 32mm (about 1 1/4") in diameter, and cost a bit more than the ordinary kind: They run €2.2 (USD $2.60) a pop.