These solar cookers are available in the U.S. through Haines Solar Cookers, but outside the U.S., the design is "open source". Roger's Rotary Club distributed 291 solar cookers in Nairobi in 2013 and found that, on average, solar cooking saved $9 a month in firewood costs. A new Rotary project, partnering with Washington D.C.-based Solar Household Energy, is facilitating the manufacture and sale of Haines Solar Cookers in stores in Nairobi by the Kenya-based NGO, NAREWAMA,