In full sunlight, it's easy to see that this bindle of sweetened coconut black sticky rice ($3) is actually coconut purple sticky rice. The distinction is mainly an aesthetic one: If you eat it like khao lam, you'll have a slightly more colorful set of stains on your fingertips. The sticky rice, served warm, would be even better (noted a commenter in another forum) if complemented by slices of chilled in-season mango.
Queen Cobra Thai
During the warmer months, at Smorgasburg
Saturday: 90 Kent Ave. (North 7th-North 8th Sts.), Williamsburg, Brooklyn
Sunday: Pier 5, Brooklyn Bridge Park