Okay, I should probably say (public service-like) that’s is generally not the best idea to accept a drink from a stranger, especially if they won’t tell you what’s in it. However, we’re talking one of those huge, field-capacity sports drink containers that everyone, including the offerer, was drinking from so I felt fairly safe from a Jim Jones wanna-be.
And it wasn’t Otter Pops. Which, for those who don’t know, were (are?) a brand of freezer pops that had cute otters with descriptive names printed on the plastic tubes. Originally I was going to have to go to a Dragon*Con party to meet the 2-party minimum to find out the secret ingredient but I can be pretty persistent (and he might have gotten drunk) and I got the real answer. But I’m not telling. Just that Jolly Ranchers were the closest guess I made.