If you're looking to upgrade to one of the high efficiency cooksets but don't want to invest in a whole new system, Optimus has the answer with the Terra Weekend HE set.  This compact and light weight cookset features the Optimus heat exchanger fused to the bottom of the pot.  It reduces boil time by up to 20% while actually reducing fuel consumption.

The main 0.95 L saucepan offers the strength of hard anodized aluminum.  It includes a pouring lip, measuring marks (mL and oz) and attached handles that fold neatly against the side when not in use.  The frypan is of the same durable construction with attached folding handle.  It also doubles as a lid for the pot.  Both items fit neatly in an included mesh stuff sack.  There's even room inside for a 230g fuel cartridge and a compact stove such as the Crux so all of your cooking gear stays together and ready to use.  The inside diameter of the heat exchanger is 2 5/8" to accommodate a wide variety of stoves.