A Maslin pan is a type of pot that is traditionally used in British and European cooking for making preserves like jams and jellies. It is a solid, heavy pan with a teacup shape and thick bottom. The pan is designed to provide maximum evaporation while still fitting nicely on a burner. The name "Maslin" is an archaic term for "mixture" and refers to using the pan for making mixtures.

Maslin pans are typically made of high-quality stainless steel, and they come in various sizes, ranging from 4.5 liters to larger sizes. They often have visible graduated metric and imperial markings on the inside of the pot, which makes it easier to measure the ingredients. Some Maslin pans come with a lid, which helps to keep the heat in and speeds up the cooking process.

In summary, a Maslin pan is a specialized pot used for making preserves like jams and jellies. It has a unique shape and is designed to provide maximum evaporation while still fitting nicely on a burner. The pan is typically made of high-quality stainless steel and comes in various sizes.