system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do most trash cans have a sort of taper like \_/ ?
gpt
Imagine blowing up the garbage bag inside with that shape until it was at max capacity. You would still be able to wiggle it free. If it tapered the opposite way, you would be unable to remove it. Even a can with perfectly square sides, if it wasn't 100% rigid, the walls would bulge and create a wedge.