Luminescent bottle diver, 5 cm

This bottle diver in the shape of a jellyfish introduces children to the concepts of density and buoyancy in a playful way.
Just put in inside a plastic bottle filled with water, screw the top shut, and gently squeeze and release the bottle. When squeezed, the bottle diver sinks to the bottom, then when released it rises again. The diver even performs funny pirouettes. The night glow effect is particularly special, allowing you to watch the jellyfish dance in the dark.

The air inside the bottle diver provides sufficient buoyancy. When the bottle is compressed, the internal pressure increases and the density of the air changes, causing the diver to sink. Inside the packaging you will find interesting information about buoyancy.

Dimensions: approx. 5 cm height, 1.8 cm Ø

• Cartesian diver in the shape of a jellyfish
• For understanding the connection between density and buoyancy
• Glows in the dark

Contents: 1 bottle diver (colour not guaranteed), instructions