Martyn wanted to share this:
The SodaCanBot has 2 touch sensors on top to fetch either the left or the right can.
The robot waits for a command and then drives to the can. It closes its gripper and lowers the rear coaster wheel that causes the robot to tilt and lift the (full) can.
Ben (MDP) listens to John (DEV) who made the SodaCanBot and demonstrates it here.
The gripper is closed and the robot is on its way to return to the can.
Here you can see the lifter (that holds the rear coaster). Now the gripper is down, and the can was just released.
This robot also has a light sensor facing downwards to follow a line. It can also use the ultrasound sensor to detect the can.