Would you recomend the Banzai Colorstream blaster?

I was wondering if the banzai colorstream blaster would be okay to get. I am only worried that it might stain, and I have heard mixed reviews for it. I think that it washes out of cotton clothes, not the other stuff. Anyhow, my friends and I would be wearing swim trunks, and I plan on getting green or blue. Please tell me. Thanks.