The material is a simple reusable shopping bag- the ones that are made out of plastic bottles. A kind of coated non-woven. The BHV Le Marais sells them at the check-outs.
I searched the store for other bags/ pouches in the same print, but they don´t seem to be offering this kind of merchandise.
High time they copied what the Bon Marché department store does.
They sell a huge variety of SLGs made from coated canvas with their lovely escalator design. Being a luxury department store the "merch" has quite steep prices, though.
Oh, these are fab! Hmmm. I was in Ikea Saturday and they have a variant of their big carrying bags in white with a white sketch-y picture of Hamburg. The bag ended up at the garden, but it may get cut down for something fun!