Let's look at this step by step:
- Ariel is a washing liquid/powder and is classically branded in blue and green, because it's so clean, fresh and obviously feels/smells like the sea/sky/nature/apples/limes/etc.
- Way too many people in the world don't have enough or any clean drinking water, which is definitely a huge issue and Ariel seems to want to get involved. I guess the relevance can be debated, but it's a noble cause, so why not.
- However little clean drinking water you have, drinking detergent is not good for you.