Abstract: In this paper，the flipping of partially filled plastic bottle is investigated theoretically and experimentally.Through simplifying the distribution of the water in the flipping bottles，the movement of flipping bottle is analyzed theoretically by using the conservation of angular momentum. Then the effects of the initial angular velocity，the proportion of water in bottle and the ground roughness on the success rate of the bottle landing stably are investigated experimentally. Finally，a game advice is given.

Key words: partially filled plastic bottle, flipping, landing stably