Whole eating from a plastic container that had 4 different pockets in it, I noticed that the liquid food tends to enter the grooves in the container. It got me thinking what is the purpose of these and why can’t there be containers that have a smooth interior?
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It makes it so they can stack eaiser. A smooth container would get stuck if stacked because you create a air vacuum. Grooves allow air to get in and not get stuck when stacking them.
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