well, you all know that I don't use plastic anymore, so i'm TOTALLY on the lookout for alt-shopping bags.
Sooo.. how psyched was I when I found this on net-a-porter??  Just throw it in your big bag and you're ready to go!

Safety Net cotton shopper $190.00 Chocolate-and-purple polka dot cotton shopper with bird print and knot on strap. Marc by Marc Jacobs bag has a bird and cloud 'Safety Net' print on the side and a signature tag on front. click to view Size Width Height Depth ONE SIZE 18.5 17 3 All measurements are in inches Height of mannequin 179cm / 5'11" Not sure which size to buy? Click here for guidance. More questions? Email our Product Advisor A fun, casual style which will easily hold all you need for day. Shown here with Marc by Marc Jacobs shoes, a Marc by Marc Jacobs shirt, a Marc by Marc Jacobs sweater and Marc by Marc Jacobs jeans. More questions? Email our Product Advisor