The liquid is bubbling in the handled pot
The liquid in this pot has come to a boil
The liquid is boiling in a stainless steel pot
Porridge is boiling in a stainless steel pan
The contents of the pot are already boiling
The contents of the pot are boiling and making a lot of bubbles.
The syrup in the pan has come to a boil.
The liquid in the stainless steel pot is boiling.