Here's a convenient way to transport flats of blooms you've purchased and recycle a shopping bag at the same time. Start with a large paper bag that has handles. Cut the bag along both long sides of a side panel. Repeat on other side. Fold cut panels in to create more support at the base of the carrier; trim excess paper. Store carrier in the trunk of your car to reuse as necessary.
Cut and Carry
Martha Stewart Living, March 2008