Ok so I bought one and there are 2 things inside. Behind the face is a hard, blue transparent ball of about 5cm diameter that pushes the face mask/eyes/nose forward to give shape to the head. It can be seen through the eyes but one of my eyes has a bit of plush material in the way. The ball on mine is also not perfectly centered. From the feet to the waist is a soft plastic that is the squeaker and joined to the top of that, behind the chest, is a cylindrical bit of about 3x2cm, which is hard. It feels like the top of a wine bottle (hence water bottle?). There are no electronics or light up features (except for light reflection through the ball).

The arms are slightly beanie.

There are no openings or zips etc.