Show them you are the #1 fan of the Boston Celtics with this 16oz. Tritan Slim with color insert cup! Let your cup runneth over with Boston Celtics spirit with eye-popping graphics and an abundance of team color. The dual-walled design contains your Boston Celtics logo and it also helps keep your cold drinks cold and hot drinks hot, longer. NBA Shop is your source for officially licensed Boston Celtics gear.