These bottle dancers also known as water dancers or bottle devils exist since 1640 invented by Renatus Cartesius. The little figurines spin, dance and move up and down in a bottle depending on the pressure exerted on te water.

These bottle dancers also known as water dancers or bottle devils exist since 1640 invented by Renatus Cartesius. The little figurines spin, dance and move up and down in a bottle depending on the pressure exerted on te water.

These bottle dancers also known as water dancers or bottle devils exist since 1640 invented by Renatus Cartesius. The little figurines spin, dance and move up and down in a bottle depending on the pressure exerted on te water.

These bottle dancers also known as water dancers or bottle devils exist since 1640 invented by Renatus Cartesius. The little figurines spin, dance and move up and down in a bottle depending on the pressure exerted on te water.

These bottle dancers also known as water dancers or bottle devils exist since 1640 invented by Renatus Cartesius. The little figurines spin, dance and move up and down in a bottle depending on the pressure exerted on te water.

This is a so called perpetuum mobile which means as much as continuously moving.

These bottle dancers also known as water dancers or bottle devils exist since 1640 invented by Renatus Cartesius. The little figurines spin, dance and move up and down in a bottle depending on the pressure exerted on the water.

This is a so called perpetuum mobile which means as much as continuously moving.