To the aspiring troll, the original locking box had one basic design flaw: once closed, it could be re-opened.

In this version, I have fixed that design flaw, allowing for increased awesome in applications involving high-amplitude, audio-waveform-generation-based lulz.

Alternatively, you can hand it to your really clever friends and claim that it's a Japanese puzzle box.

Or waterproof it, put some awesome stuff in it, and bury it in the back yard as a time capsule. Really, the sky's the limit!

I've also added an alternate lid if you would like your box to be a piggy bank. If you want your money back out of it, you'll have to smash it. Just like the good old days!

1: Print. 2: Be careful. Once this is closed, it is CLOSED. 3: Insert object which you would like to be permanently sealed. 4: Close box. 5: ??? 6: PROFIT!

Also, if you'd like to do some testing, please tell me in the comments what your results were. So far I've made two of the totally sealed boxes, and the first one the tabs broke trying to close the box. The second one a coworker threw as hard as he could into a concrete wall twice, and on the second throw the lid popped off. Again, the problem was that one of the tabs broke. In v2 I am going to add some beefier tabs, and this box should present a real challenge for anyone wanting to get into it.