Those look great! I assume that these will bee seen on tables and shelves and stuff in an environment? If so it is not going be worth going further with them. If you did want to go further I'd suggest trying to get the glass material to look more like glass than crystal. And if you felt like it getting this detailed it might also be worth it making the mesh imperfect (things such as making the bottom thicker on one side or the wall thickness vary more etc.). But as I said I think they look great, the rightest most two are the most promising, I'd tone down the red in the glass though as it drowns out the red of the potion.