These were a gift, but I have been informed that they produced the desired response from a family member who was not convinced whether they had had too much to drink or not and couldn't figure out quite what was wrong... Perfect.
I bought these as a gift for my son-in-law. He's a difficult man to buy for and this seemed like a fun idea. He tells me that his guests smiled, but had not had enought alcohol to be seriously fooled. Still, he said he liked the idea even if it is a bit corny. The glasses are perfectly stable, but don't look it. If you don't want spillage, that has to be a plus, but you can immediately see, with a sober eye, that the 'wonkiness' is deliberate.