Happy Filled Glass is a free online puzzle and fun game. This is a game in which you need to draw with a pencil the optimal way to move water to fill a glass. Happy Filled Glass, puzzle game, free online game, drawing game, water puzzle, logic puzzle, casual game, mobile game, arcade game, spatial reasoning, problem solving, brain training, skill game, hypercasual, water redirection, fill glass, pencil drawing, drawing game, fun, addictive, gameplay, brain teaser