Check out this humble black marker pen.
What about it, you ask? Well, look at the close up: this marker marks most surfaces, is waterproof, practically odorless, safe… and has a cap off time of up to two weeks without drying up.
What about it, you ask? Just think of the hi-tech perfection that this list describes. What more could anyone ask for in a marker? Not long ago, you couldn’t get this for money or love. In particular, consider the 2-week cap off time. That was the one shortcoming of felt tip markers: they’d dry out if you forgot to cap them. Not any more, it seems – those boffins at the marker factory have figured a way to make ink that doesn’t dry until you actually mark with it.
That’s progress for you!