Hip-Flask is Felix Ure's widely anticipated second design, following his very successful Titan take-apart puzzle. Described as a fiendishly challenging, multi-stage, sequential discovery puzzle, the goal is to remove the lid from the flask.
Machined from solid brass, Hip-Flask measures 72mm in height and weighs 750g or approximately 1.5 lbs. The brass is left unfinished, leaving it to slowly patinate and darken with use. Difficulty: 7/10
Puzzle Mad featured a very nice blog review about this brass puzzle.
Boxes & Booze also wrote an excellent blog post about this puzzle.
A video review by Mr. Puzzle can be found here
A blog review by Mr. Puzzle can be found here (WARNING: blog contains solution spoilers)
Handling Metal Puzzles
I originally saw Chris Ramsay solve this puzzle a year or so ago. Even though I had seen it solved, the tactile design makes for its own learning curve, so I knew I had to have it. Solid brass construction, has some weight to it, and is interesting to look at. Overall, it’s a genius design with a satisfying result when solved. 5 Stars!
Such a satisfying puzzle! It's very heavy for it's size. The parts are so precisely machined that I thought air pressure might play a role in it's solution. The 7/10 difficulty feels about right.
Eric has a great site and super service along with great products!