That's Cousin's branded paintballs. They're a paintball company that's been around a very long time, since around 1987 if I recall correctly. They have 3 pro shops in New York and 1 in NJ, as well as fields in NY, LI, NJ, and TX.
They usually sell their paint for much more than what you paid, so I'd say you got a good deal. Cousin's also used to make some really nice and limited autocockers back in the day.