Apple’s patented pizza box set the tech press on fire earlier this week when Wired took a behind-the-scenes look at the nearly finished Apple Park campus.

Even though the story packed tons of interesting details about the campus — like how it originally looked like a penis until Steve Jobs’ son intervened — the custom-designed Apple pizza box stole everyone’s attention. The box has actually been on Apple campus for a long time, but was never seen by the public until now.

The folks at The Outline managed to get an Apple pizza box shipped to them straight from a source at one of Apple’s office buildings in California.

Watch the hands-on review:

Apple patented the pizza container back in 2010. Unlike traditional pizza boxes, Apple’s is circular and doesn’t have to be assembled before use. Eight ventilation holes are located on top to let steam out while still retaining most of the heat.

Mac Caffé inside Apple HQ serves personal thin crust pizzas. The boxes are approximately 14 inches in diameter and can be stacked on top of each other so one employee can do a pizza run for the whole team.