If it is single blocks, I have a piece of flannel backed tablecloth about 14 X 14 that I use for transporting single blocks. On one end of the 14 X 14 piece of flannel, I sewed a clear piece of 14 X 14 vinyl/plastic. I can flip back the vinyl, place my cut block pieces on the flannel, flip the plastic over the block and roll up the square. You can sew a piece of ribbon on when your sew the vinyl to the square and this allows you to tie the tube up.(or just use an elastic.)I've also seen it done with a piece of flannel tablecloth that you fold in half and place the pieces between the two flannel sides and roll up.