I've had much fancier bottle whimsies, but I think the more humble (though still completely baffling to me!) yarn winder types are my favorite of all. This one is 19th century, with carved wooden stopper (walnut I think?), held forever in place  by a cross bar just below the neck. With two "yarn winders" inside, held to the central post--one horizontal, one vertical, both wound with yellow and white yarn-- with the post standing on four arched feet. The bottle appears hand-blown, with pontil at the bottom.

5 1/2" t x 1 13/16" diameter and in very good condition. Some dust inside bottle, more pronounced in photos than in hand.