Would you please add Ice House to Structures, and Ice as a purchasable product?
I think ice would be placed under either Miscellaneous or Exotic. People could gather and use ice (manually with a shovel while using Ice Houses to preserve them) to store perishable goods that require refrigeration, or use it to create ice-cream and other cold treats. It would however, be rare and almost impossible to purchase it in places that do not have Ice Houses, or places where it does not snow anywhere nearby.
Ice Houses are insulated (usually using straw and/or wood shavings), cone-shaped structures used to store ice. They usually have a drainage system that allows the melted ice to drain out of the structure. The ice lasts for months or seasons, usually until the next winter. They'd been around for the most of the Medieval era, so I think it'd be an nice addition.
Thank you kindly!