I have a zippered, wallet sized pouch that a fabric shopping bag unfolds from. People where I got it (either Spain or France) took them to the market to do their daily shopping. I always thought it might go over here, except people here usually buy several bags worth when they go shopping. The topless beaches in France weren't anything spectacular, since we have a nude beach right here in the S.D. area. I used to go there in the '70s.
AFAIK it's still going strong.