You may want the students to bring in drinks cans for investigation.
Quantities of empty drinks cans have been found in and near the building.
There were plenty of soft drink cans and paper cups, too.
Rick picked up one of the soft drink cans and popped the top.
Marie held the bag open while he tipped in the empty drink cans.
It is found at home as saucepans, soft drink cans, and cooking foil.
Where the refinery once stood, the oil tanks have been crushed like empty soft drink cans.
The first mission of the challenge involves knocking down drink cans of 330ml each.
Throughout his journey, Harry encounters puzzles, such as keys in empty soft drink cans.
Last month, for example, Beijing announced that to save scarce resources, manufacturers of soft drink cans must immediately cease production.
