So skeptical I tried this cup spout. And nickel!
Already, it is easy to open and fill even my last 4 years gets there without pb.
Even upside down, not a drop, unless you just drink it (there is always a few drops, they fall but it's really minimal)
We tried it on several nights without the cap, and no puddle in the bed
I love it. In addition, the design is nice, my daughter loves the little penguin ^^
I just have to buy a second to my last now wants, too, its water for drinking the night