Squared cracker + tpu seal

###DESCRIPTION
####model
This is a Nitrous Oxide cracker that can be printed with a seal to prevent the gas from leaking out of the balloon.
Note: the bottom part is screwed backwards to prevent the screw from loosening up over time
####warning
N2O depletes the body of vitamins B12
read more at: https://psychonautwiki.org/wiki/N2o

###PRINT INSTRUCTIONS
####top and bottom
3 to 4 walls
minimum 15% infill
####cover
TPU (or alternative)
no top layers
3 bottom layers
2 walls

###ASSEMBLY
Drive a sharp ~15MM wood screw into the top hole
Once done, place the cover over the screw to conceal it
If necessary, you can apply silicon lubricant (or any alternative) on the bottom part's threads.