Frosty

Frosty is an Shop NPC located in Jerry's Workshop at.

Purchase
Talking to it the first time will give you a Frosty the Snow Cannon for free.

If you want to purchase another Frosty the Snow Cannon, interact with Frosty without the item in your inventory and Frosty will offer to sell it for.

Refill
You can refill your Frosty the Snow Cannon or Frosty the Snow Blaster by left-clicking Frosty with either item in your main hand.