TPC Chill and Serve can be used in multiple combinations See pictures on bundled items and the weight limit- The large and serve cannot be bundled- The 9 x 9 and 12 x 12 if bundle together will be an additional three dollar box, which is an additional label to distribute the weight, thank you for your understanding See pictures for details Up on joining Poshmark, enter mrsflintstone1 for $10 off your first purchase