Wine & Music,Best Combination

Can you guess what it is used for?

— en... its seems like a chair, you know egg chair.

— Nope. OK, give you a tip, its base is rotatable.

— Is it a cup? Oh, yes! A wine glass,I am sure!!!!

— Sorry, it seems you'll never know the truth......

— Oh No!!!!!! Pleaseeeeeeeeeeeeee!

— All right! Only this time! Pay attention! Turn on the light!

— It's a Bluetooth speaker,but its base is rotatable to adjust volume.

  Surprise! How to use it? It can tell you.