Hi there,
This is Bogdan from Romania.
I'm a mechanical engineer, specialized in the industrial robotics, 3D modeler and designer.
I have over 15 years work experience, designing, prototyping and launching different devices/systems across multiple industries.
I could help with your project.
I could design all three ice forms (sphere, cube and jar), but we have to discuss about the shapes and material - as you know, when freezes, the water expands and increases its volume, so it is necessary to have a mean on the forms, or a proper material which to allow this expansion.
Also for the jar shape, it is necessary to carefully choose the font and the thread dimension in order to be still visible when the ice forms.
For any other questions, you may open a chat room here and we'll discuss about the details.
Regards
Bogdan