Why and how does water temperature affect the launch of a water bottle?

Water temperature affects the launch of a water bottle primarily due to the density and viscosity of the water. Colder water is denser and less viscous, which can create more resistance and reduce the bottle's buoyancy, affecting how it launches and travels through the air. Conversely, warmer water is less dense and more viscous, allowing for a potentially smoother launch. Additionally, if the water is heated to a point of creating steam, it can increase internal pressure, leading to a more explosive launch when the bottle is opened.