Unravel 3 rings from the circular design of this cast metal coaster puzzle by Hanayama and then reassemble them to complete the puzzle. This piece doubles as a functional coaster for cups or glasses, combining practical use with a mental challenge. Material and design - Material: cast metal - Design: circular coaster with three interlinked rings - Functional as a coaster while delivering a satisfying puzzle experience Key benefits - Durable construction for daily use at home or in the office - Reusable brain teaser that improves focus and problem solving - High quality manufacturing and reliable performance Compatibility and use - Works with standard drinkware - Compact size suitable for desks, coffee tables, or shelves Why choose Hanayama - Hanayama is known worldwide for sophisticated puzzles and high quality manufacturing Use scenarios - Desk break: solve during a short pause to refresh focus - Living space: display on a coffee table as a conversation piece - Gift: ideal for puzzle enthusiasts and collectors