[sblvro]

the plastic cup with the two clear hoses are actually a one-man brake bleeder as shown in the picture by hondaman2. The clear hose that connects to the cup and also with a hose inside the cup is used for the bleeder while the other hose(usually short is just for drainage). What it does is as you press the brake pedal, it squeezes out the brake fluid and prevents air bubbles from being sucked in because the hose inside the cup sucks the brake fluid inside the cup. You have to do it repeatedly until the cup is full so there is no air bubbles.