The MSR SE200 Community Chlorine Maker is perfect for emergency preparedness or traveling in large groups to places like Kenya, Mali, Tanzania, Zimbabwe, and Thailand. It creates chlorine for safe drinking with only water, salt, electricity, and a push of a button. Five minutes later, you'll have enough chlorine to make 200 liters of drinking water. It's so effective that emergency non-profits have been sending it to places like Haiti after hurricanes to create cleaning solutions that ensure sterile environments in cholera-prone regions. Small, light, and portable, the SE200 is easy to take anywhere you think drinking water might be sparse.