"A water filter, and an instruction book of why and how to get clean water.
The filters in The Drinkable Book are designed for the over 2 billion people living on less than $2 USD per day. These paper filters produce clean, safe water for the cost of just a penny a day, and creates improved health and wellbeing, especially for young children, through encouraging behavior change through hygiene education combined with an affordable and convenient water filter. 1 page can filter water for up to a month for 1 person; the book can filter drinking water for about a year. The filters have been successfully field tested at rural villages in Bangladesh, South Africa, Ghana, Honduras, Haiti, and Kenya."