Eitan's TriCube 

Brand : Calvin's Puzzle
Material : ABS plastic
Packaging : small clear box
                       

Puzzle info.:

Eitan's TriCube is a brand new design which is designed by compounding 3 individual cubes. Inside, we use 12-armed ball core that is talor-made for this new puzzle.
The quality of this puzzle is currently the best amount of Calvin's puzzles. The design is elegant and challenge to solve it. 
The mechanism do not have much corner-cutting feature as speed cubing cubes. But, it do turn very smooth. You have to retain the plastic color as original stage to solve it.

You won't regret to try and play them on hand. 

Enjoy !