Some of you are aware that I have spent time building homes for Habitat for Humanity in 2 African nations - Ghana and Tanzania.  In both locations, I was astounded by the incredible amount of effort required at the beginning of the day in order to collect the water necessary to mix morter.  This task was especially arduous in Zanzibar, where each team member (and many locals) carried a 5 gallon bucket (or any other type of container to be found...Africans are VERY resourceful) over 500 meters to the closest well, then hauled it back to the site.  Keep in mind that 5 gallons of water is very heavy, and us white folk had not quite attained the skill of carrying the buckets on our heads, as our clever African friends did, which lead to very calloused hands. 

Enter the Hippo Water Roller.  What a PERFECT idea!  This bad boy can haul 200 gallons of water and requires little effort on someone's behalf.  Hopefully these things can be mass produced at prices that will allow even the most hard-off nations the ability to afford at least one per village.  I know the people of Kiombamvua would appreciate one!