This is the SoccerMAS REACT3ON: a fast soccer trainer that works lets you work on leg speed, reaction, kick accuracy and reflexes while pushing your stamina to the next level. It is pretty easy to use too: simply fill the based with water to turn the superpolymer powder inside into gel, hook the ball, and you are ready to go.
This soccer trainer comes with two balls for reaction and reflex training. It has EZ interchangeable elastic bands. You can find out more about it here.