From the looks of it, the 'I Helped Clean Up the Gulf Oil Spill' tee was used to clean up the oil spill. Well, not actually, but some of the oil spilled was used to create the t-shirt, which you can purchase from the I Helped Clean Up the Gulf Oil Spill site.
Steve Brooker of Kansas was frustrated with the spill and has found a way to use the reclaimed oil to print tees. A portion of what a donor spends on the shirt goes to a wildlife organization of their choice. The 'I Helped Clean Up the Gulf Oil Spill' shirts are definitely an interesting way to raise money.