The Optimus Crux is a powerful, ultralight, and compact gas canister stove (3000W/10,200 BTU) known for its folding burner head that allows it to pack inside a fuel canister, offering precise flame control and fast boiling (around 3 min/1L) with a burn time up to 90 mins on a 220g canister, weighing just 83g (2.9oz).