One of my dad's friend's told me about this. But he is the type of guy that tells you about a lot of shit, as in he never shuts the fuck up. So I usually take what he has to say with a grain of salt. But if this works it would be cool. He claims that if you put smoke into a frosted mug the cold of the mug will prevent the smoke from escaping. So you spark a joint, and once it's lit you put the hot in your mouth (being careful not to burn yourself) and blow into the frosted mug. After you reverse smoke the joint, the frosted mug supposedly has a joint worth of smoke that you can now sip on. Has anyone ever done this? Does it work?