Watering Can

The Watering Can is the first thing the player starts with in the Zen Garden. It allows them to water plants so that they will grow and become happy. It can be used for an unlimited number of times, and you get it by picking it up from the last zombie on level 5-4, after which it will direct you to the Zen Garden. For $10000, the player can upgrade it to a Golden Watering Can in order to water up to four plants at once. The water in the Watering Can apparently lasts forever, as there is never any need to refill it. This would be weird.