Product review (4 stars): Use the knife-holder lids to prevent cutting through the basket bottoms!
Just like the original baskets. I realize now that I should have been closing the basket lids and inserting the knives through the lids to keep them from cutting through the bottoms. I didn't do that previously which is why I needed to replace the original basket. Thanks to the other poster who pointed this out. This seems obvious now, but I never thought to do that previously, probably since I grew up with metal silverware baskets that didn't have such knife-holder lids.