The Watering Pot

Tyke wields a green watering can with a flower design on it through most of the game, only dropping it during cutscenes

The watering can can be used to vanquish the stump monsters and to grow trees

The watering can is always actively producing water no matter the player's impute. The eternal watering only ceases when other menus are open

The watering can is never lifted to produce this water unlike real watering cans

Despite being a watering can, it never pours water, rather spraying frequent droplets

The watering can has seemingly infinite liquids, implying interdimensional fluid portals, or other means of infinite liquid

When using the "Fungal Fertilizer" after completing the mushroom's minigame, the watering can will instead temporarily produce green blobs along with normal water, this is most likely a fungus

There is no visible hole on the end, further adding to the question of where the water comes from and how the can works