The popular Tenn Tubes come in 9 bright colors.  Heavy gauge rubber end caps won't crack.  A rubber band at one end holds the balls in place when the tube is laid flat. The 48" tube holds 21 balls; the Tenn Tube Jr. (an exclusive with Oncourt Offcourt) holds 15 balls. The Tenn Tube Jr. is designed to conveniently hang on the side of a teaching cart. and is 36".