Logitech's Well-Designed, Easy-to-Open Clamshell Packaging

My PC's mouse quit on me in the middle of a project, and I had to run out for a replacement. The only mouse available at my local Walmart (made by a company I've heard of, anyway) was this guy: I hate clamshell packaging, and was about to grab tinsnips when I spotted these arrows on the back of the packaging: They point to these two half-cups at the top corners: They're easy to get a fingertip into… …and the rear panel, which is attached by little plastic spot-welds, easily...