Screw Childproof Tin Can

It's classcial round childproof tin can, but it's not hot in the market because of the higher cost and more childproof tin can as options in the market. Comparing the screw childproof tin can in market, this version adds more funny designs like spring, mechanical lock. There are three pieces in lid area - outside lid, spring and inside lid, the screw of inside lid locks the screw of bottom, four slots of inside lid matched four slots of outside lid, various smaller slots on inside lid, spring separated outside and inside lid, this screw childproof tin can likes mechanical lock with click-clack when turning this tin can. It doesn't like open tins with happy time, but spy to filch the secret files.