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Solar sack

Safe Drinking


Providing safe and affordable drinking water to disaster areas and water challenged communities, changing people's lives, preventing deaths, and growing nations.

Simple and sustainable.



United Nations state that access to safe drinking water is a basic human right, yet 2 billion people in less fortunate parts of the world have only access to unsafe water sources. This combined with poor sanitation and hygiene is the root cause of one of the world’s biggest health challenges.

Unsafe drinking water increases the risk of transmission and outbreaks of diarrheal diseases which in worst case leads to death. Over 80% of the diarrheal deaths attributed to unsafe drinking water occur in the developing world.


500.000 children die from diarrheal diseases every year – this is more than HIV, Malaria, and Tuberculosis combined, and makes it the second leading cause of death among children under the age of 5 worldwide.3,4 Yet, only 1 out of 3 households are purifying their unsafe drinking water3, where boiling over firewood or charcoal is the most commonly used method – a process that is very time consuming, emits a lot of CO2, impacts health by indoor air pollution, and leads to deforestation.5,6

The tiresome work of water and firewood collection is predominantly done by children and women7,8, which take time away from attending school or working to support the family’s income.



SaWa (short for Safe Water) is a well-proven Danish invention based on the WHO-endorsed SODIS (short for SOlar DISinfection) process to purify microbial contaminated water for drinking9,10. The traditional SODIS process by PET bottles works by harnessing UV-A rays and heat from the sun. SaWa has improved this method by also harnessing UV-B rays, which in combination with the UV-A and heat significantly reduces the purification time and improves the killing of bacteria, viruses, and protozoa to a performance of minimum 99.9%

SaWa has been developed in collaboration with end-users in the refugee settlement Adjumani, Uganda. The size, capacity, features and working processes are carefully designed to fit the daily lives and needs in low-income, rural communities.


SaWa is the only sustainable, simple, and affordable solution for safe drinking water to the 2 billion people with limited or no access to safe water.





4 litres at a time

SaWa purifies 4 litres of water at a time by placing the bag in the sun for 4 hours.

Carbon offset-model for impact and scalability

SaWa creates more CO2-offset than it costs to purchase and implement.

Verified purification method

SODIS (short for SOlar DISinfection) process was developed in the 1980s and is endorsed by WHO.

2000 litres of safe drinking water

SaWa can be reused up to 500 times providing a total of 2000 litres of safe drinking water.

Sustainable and affordable

SaWa purifies 2000 litres of water for – just using the power of the sun.

Trustworthy implementation

SaWa projects are endorsed on highest governmental levels, implemented by the most trustworthy NGOs in the world, and embraced by local communities in need.




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