Funny story about that… I used to do it myself back in my football days. Watched a girl take a huge gulp of one of our cups at a party (solo cups usually contain much better substances than those left by a tobacco user). We tried to stop it but were too late and this girl was literally deaf in one ear, so I don’t think she heard our efforts to stop her from across the room among partying young people. To this day I don’t know how she kept her composure but she must have been embarrassed because she swallowed it and without a word or reaction, calmly walked out of the room (I assume to relieve her stomach contents in private). YUCK