TABLE Water and Soap Efficiency for the Povu Poa Handwashing Prototypes Compared With Other Handwashing Devices

	Soap Type	Water Quantity per Use (mL)	No. of Uses per 5 L of Water	No. of Uses per US$1 Spent on Water	Amount of Soap per Use (g)	No. of Uses per US$1 Spent on Soap	Cost in US$ for Soap and Water per 100 Uses
Povu Poa pipe model	Soapy water made with Omo brand powdered soap	357	14	1,064	0.03	14,865	$0.10
Povu Poa bucket model	Soapy water made with Omo brand powdered soap	333	15	1,140	0.03	15,696	$0.09
Dual tippy tap	Soapy water made with Omo brand powdered soap	625	8	608	0.96	500	$0.37
Jug and basin	Multipurpose bar soap (Toyo brand)	513	10	741	0.49	1,600	$0.20
Sink with metal tap	Multipurpose bar soap (Toyo brand)	1,429	4	266	0.71	1,100	$0.47
20 L barrel with metal tap	Locally made liquid soap	690	7	551	1.90	800	$0.30
20 L barrel with plastic tap	Locally made liquid soap	1,000	5	380	2.85	550	$0.44
15 L bucket with plastic tap	Multipurpose bar soap (Toyo brand)	833	6	456	0.89	900	$0.33