Everyone knows that oil spills are bad, but not many people know that they can help prevent them. No Tankers is a BC-based organization dedicated to keeping tankers and their oil out of the ocean. They needed to drive traffic to their website so they could educate people on the issue and inform them how to take action. To do so, we made posters with a water-soluble, vegetable-based ink that spilled all over the streets of Vancouver when it rained.