The Pack Stove, from Simple Theory Gear, is a clever and subtly different take on the twig stoves that now quite common on the market. Many twig stoves pack flat by hinging or separating into individual flat pieces in order to take up as little space as possible in your pack. The Pack Stove takes a different approach, nesting on a pot or water bottle, in order to take up even less space and require less setup.
The cylindrical shape of the Pack Stove allows it to nest on many common water bottles or cook pots like the excellent and affordable Stanley Adventure Cookset. This allows it to be stored in a water bottle pocket on your pack, which is space already occupied by your cookpot or bottle.
The stove is basically always ready to use. There is almost no assembly or take-down other than installing or removing the grate if required for your pot. The grate stores on the bottom of the stove when not in use.
The Pack Stove can also be used with alcohol burners and fuel tabs. Its weight is on par with steel flat-pack twig stoves at 11.5 ounces.