I ordered this necklace because I had heard that Amber helps with teething/drooling, and my 2 month old just started drooling, so I wanted to get a head start on prevention. This necklace certainly seems to work, my baby doesn't drool when she's wearing it. I only put it on her when she is awake and under constant observation, so she does drool during other times. I love that it has a snap clasp instead of a screw, which makes it much easier to put on and off a squirming baby quickly.