This model is custom-designed. It includes a base with holes for the fountain and the top. I printed this at a uniform scale of 50%. At 50% the bath toy is about 6 inches long and 4 inches wide. It was made for the bath time. It's not only a fun and cute little toy but is also a safe choice for babies ages 6 months+.
The diameter of the top with the threads is 135 mm and the diameter of the base is 133 mm (at the scaled down version at 50%). It's a tight fit but it should fit together.
The author marked this model as their own original creation.