This sale is for an older brain teaser puzzle. It consists of a glass bottle with a wooden dowel rod or stick in it. There is a bolt and a cotter pin in the rod. There is also a wooden ball inside the bottle. The trick is to remove the bolt and cotter pin in order to take the rod out of the bottle. The puzzle stands 8 inches high. It is in good condition with no problems. Please check out the other puzzles and brain teasers we are offering on eBay.