To keep the mess to a minimum, cut a few entry holes in the lid and put the lid on the box. (smallanimalchanel.com)
She could see him scanning the corners of the attic for entry holes, and he didn't reply. (bookbrowse.com)
Indeed, when we showed up for testing and poured the litter into boxes, cats immediately jumped in and started using it, before we could even move the litter boxes into their designated spots (hutches with entry holes shaped like cat faces), while more crowded around. (thewirecutter.com)