After last nights Skype session, I went away trying to develop an effective form for the glass. I started by thinking about what other products spin ? I ended up looking at spinning tops an old childhood toy, I looked at these to help try to find an effective form.

These are just initial sketches and renders to get the form idea across. I aim to make the centre of the glass thinner for easier grip. Some feedback on the general form direction would be good so I can develop further and start to get a final form for the glass .