But none of that changes the fact that coffee is a hot drink. When you go into some store, and order some potentially harmful item, you should expect to get a potentially harmful item, and handle it accordingly. It's not the store's fault if you fail at doing so.
(As an unrelated note, insulating cups are dangerous in that they enable careless handling. It's again not the store's fault, consumers demand those cups, but it's something worth warning people about.)