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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They add strength to the containers. I’m assuming the container was made out a very thin plastic? There are containers that have smooth interiors, but they have to be made out of a thicker material (which makes them more expensive).
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