One of the local craft stores held its annual fair this weekend, so off I trotted... One of the make and take tables was surrounded by women oohing and aahing. When I finally got close enough to take a look, I could see why. The demonstrator was showing people how to make boxes like this, and there were several of varying sizes on display.
I should have liked to make one there, but after watching for a while, I could see that most of the people in the seats were either children or inexperienced crafters. I worked out that it would have taken more than an hour to get a seat.
I heard the demonstrator mention one of the measurements, and I purchased the template she was using. The rest, I figured, I could work out for myself.
At home, my efforts were not completely successful at first. Among other reasons, I wasn't enamoured of the template, which kept slipping and bending. So, I decided to sleep on it and try again this morning.
After a night's sleep, I had a couple of ideas about how best to approach the box. Instead of the template, I used a parabola ruler to mark the curved lines, and I replaced the craft mat with a foam place mat from Ikea.
This is the outcome. The process is easy enough, though it does require some measurement and careful cutting. I'll try to make time to do and upload a step-by-step photo tutorial later this week.