Aqua Tap is a new 1 vs 1 outdoor sport that uses glasses of water, coasters, and marbles. To play, each player stands on either side of a line of glasses filled to different water levels. One player attacks by filling glasses past the marks with a bag of water, while the other defends by blocking with coasters and placing marbles in glasses. Players earn points for filled or blocked glasses based on the water level, and compete over sets and 10 total rounds, with the highest scoring player winning.