I don't think it was a snag. It was really really stiff. If it wasn't, I would have left it alone
When I snipped it off it felt like there was something stuck in it and I looked (at the part that was snipped off, not in the Guzzler itself). I remember it looked like a tiny particle of white cloth or something, I just looked at it quick n threw it away. So far problem's solved.
I just got all three Guzzlers, all three sizes. I did a qucik check to make sure I don't have any of those. I'll be sure to check them religiously after using/washing.