Slid right on, even with knob on top of spout (shower pull). Does catch some water inside if I don't have it all the way slid up, but it would stay in place if the boys didn't always want to pull it off and play with it! Very cute, and protects their heads from the hard metal. It's made of semi-hard but pliable plastic (not squishy plastic) but does the trick. I'd buy it again.
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