If you mean these bottles...
with these spouts (I believe they are called yorker spouts)...
I feel your pain. The liquid leaks from the threads when you squeeze to hard too many times. It's annoying. I take a clean nail of some sort and widen the hole in the spout so I don't have to squeeze too hard to get liquid out. But it still leaks every once in a while.
But they are better than these spouts...
They're great at first, but over time they inner part of the adjustable spout wears. It traps liquid inside and then at the point where it is worn liquid leaks out of it when you go tip the bottle. So I went back to yorker spouts.