I like this cool set of wooden bottles, tinted in the colors of six common wine cooler flavors. They're made by Holgate, one of the earliest US companies to develop educational toys. Unfortunately, one of the bottle stoppers is missing; given the bottles' size [5"] and pre-CPSC vintage, I'll assume it was accidentally swallowed by a previous owner.
Vintage HOLGATE community Playthings WOOD soda bottles, first bid, $10+7 s/h, auction ends June 6 [ebay]
Related: an awesome array of vintage Holate toys [antiquetoycollections.com]