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’s to make them stronger. These trays are run off machine in batches of 100s of thousands. Dropping the tray gauge by 25micron could save a significant amount of money. Often a client would ask to drop tray gauge as a cost saving exercise. The development cost for the supplier was often insignificant to the price of the contract so suppliers generally swallow the cost. Client saves money and supplier keeps contract
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