I prefer to travel as light as possible. I use a heavily tinned cup (size of standard coffee version) when the other-half isn't part of the equation. She wants the contents of a Conestoga wagon hauled.
I have a small 3-legged cast iron pot with a round casting sprue indicating it was made before the change in casting methods that took place around 1770. I felt guilty about using an original piece. A few weeks ago in a antique/junk shop, I found a $20 special that was probably made after the War of the Rebellion (1861-65). Until a decade or two ago, very similar cast iron pots were being made for the African market.
The "new" one has round ear-lugs, not the "7" shaped ears found before the war. The triangular legs, the scarring of a long casting gate mark was ground off, and the wire bail are later characteristics. The reproductions sold by Townsend are Chinese knock-offs that look good, however, I don't trust recycled Chinese iron products. Later style South African "potjies" are available through Amazon and ebay, and these are not spot on repros.
For heating water and basic stewing if the other-half is with me, I'll grudgingly take the $20 special. Very few people will look at the underside of the pot, or notice the ear shape. For living history events in settlements, cast iron wouldn't be out of place, although the weight, bulk are reasons I would not haul it around on a trek.