Keesha conducts an experiment by pouring equal amounts of boiling water into four containers. The containers are the same size and shape, but they are made of different materials. The chart lists the containers according to their materials.

Using protective gloves, Keesha carefully touches each container immediately after pouring the water. Which container was likely the hottest?
W: Foam
X: Glass
Y: Plastic
Z: Stainless Steel