Badminton Training Equipment Delicate design: the badminton training device uses non-slip material on the bottom to keep the training base in place. Unscrew the cap on the training base so you can fill it with water or sand. Once filled, it is heavy enough to support you swing and adopt an anti-twin design on the top of the base without having to deal with tangled bungee cords anymore. Easy to use: start training your serve, forehand and backhand effortlessly. In single badminton training, you do not need to pick up the ball, the badminton hits the elastic rope and bounces back automatically. Single badminton training, you don't have to wait for a partner. Just train with yourself.