This is not an English term.
I have googled 'snoozing bottle cap', and the one and only reference I can find is a correspondence on an importer's site between a Brazilian company and a Chinese one. It is obviously a mistranslation of a term, either on the Chinese or Portuguese side. The only clue is that the buyer says that the device 'reminds people when to drink water'.
By the way, when I tried google images, all I got was your profile picture, along with those of dozens of other italki members!
As for what sort of bottle cap this is - your guess is as good as mine.