That's where solar cookers come in. They are completely sustainable, can be used to cook AND purify water by boiling it, and are relatively inexpensive. What better way to help in a concrete way than give someone effected by the earthquake a means to cook and prepare drinking water without it costing them anything. And the best thing of all, it won't cost you much.
For just $40 Solar Cookers International will send a solar cooker down to Haiti and deliver it to someone who needs it. I just got off the phone with them to check some info and they have people on the ground who are delivering the cookers and teaching folks how to use them. There was already a system in place to introduce cookers in Haiti prior to the earthquake so they are continuing to work with those contacts. They are also working with a Methodist Orphanage and several NGOs as well.
So there you have it. $40 and someone has a way to prepare food and water that will cost them nothing and last indefinitely. Your $40 contribution sends a solar cooker, pot and WAPI (Water Pasteurization Indicator) to someone in need. Can't get much easier than that.
You can donate here. And while you're at it, why not challenge your friends to do the same!