For pre-testing the HW prototype two different formulas of soapy water were prepared. The device will be pre-tested in households and schools from the Coast, Andes and Amazon.
One of the formulas requires to put a small piece of soap in 1lt of boiled water for 5 minutes.
The mixture of soapy water was tested several times until finding the proper consistency for HW.
El prototipo está diseñado para sostener dos botellas de hasta 3 litros, una de ellas con agua jabonosa y la otra con agua para enjugarse.
The prototype is designed to hold two bottles of 3 liters, one with soapy water and another one with clean water.