My Rainbows lasted a few years and had a couple of more years on them, but my puppy tore them up.

I gave the Sanuk Beer Cozy a shot, and they by far are way more comfortable, and they seem to hold up and are pretty durable despite some of the previous reviews.  As far use, I use them at the beach, dog park, running errands, etc.. simple casual stuff.

Can't go wrong with the price and amazon's free shipping.