State-of-the-art nestable hopper. you will no longer have these issues. hop-a-razzi™ cleans up a tennis court filled with balls by smoothly rolling directly to the ball, making ball retrieval quick and easy. No more dragging the ball baskets across tennis court surfaces, tearing up the courts and damaging the baskets. Kids, adults and senior players will find this easier to use with less strain and effort. The unique rolling feature moves the hopper across all court surfaces eliminating the difficulty of carrying a ball filled basket. The creative adjustable handle allows for height variations, making ball retrieval much more comfortable. There is no longer any need to purchase different ball retrieval devices for kids and adults. This avant-garde design is modeled for everyone from 4 years old to the senior player.