We’re all pretty bored of plastic or aluminum capsules for coffee-making, and I guess buying pre-ground coffee, a beans-to-cup machine or just grinding your own beans is too much work for some folks.

I loved the idea of time capsules when I was kid. I used to grab action figures and pogs that I didn’t want anymore and bury them in a box marked “do not open for 20 years,” and imagine a future ...