This bottle's screw-top cap had been replaced with a chrome pourer, and I'd [mistakenly] believed its plastic cap would keep Bad Things out. Careful inspection reveals a small air hole that lets the little buggers reach the top of the breather tube. Hey, what's more fun on a hot day than a water park slide? Of course, once they reached the syrup, they promptly overdosed on all that sugary goodness. Even though the bottle was mostly empty, with only about three-quarters of an inch of liquid remaining, I still don't like having to dump it.