It’s not hinged style child resistant tin but the up-bottom version child resistant tin box. Comparing the limited height of hinged child resistant structure(height within 25mm), the size of up-bottom child resistant mechanism can be customized and it can be applied to all shape of tin box.

The smallest child resistant tin box can be 1.25”x1.25”x1.25”. To achieve this child resistant square tin cube, it needs special material with anti-pressure design. The elasticity tinplate is not enough for special material, the tinplate needs to be printed more times to overcome the printing variation(especially the corner area). Anti-pressure design solved the deformation when pressing the lid to open tins. It’s not easy to control the size of slot in lid area(easy or hard to open) and two sides rolled edge should be irregular to overcome the pressing hardly to open tin. The final opening method of CR tin cube is to hold the tin body and Push-Press&Lift lid. For the large child resistant tin box, just special material and keeping the hard tinplate will be fine.