Assuming that by locks you mean the latches that can keep the lid shut, I think Sterilite tubs are pretty standard. Not sure if any tubs have particularly great latches though, the centre of the lid can usually lift slightly so that part needs to be held down by books, binder clips, or luggage straps. Some people have also made DIY latches by drilling holes and putting a snap hook through it to keep the lid shut.
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