"I'm in the ID department at my local college fairly regularly and see plenty of students with various tackle box style art supply containers.  My partner is doing her masters in architecture which shares the same building, and she definitely has to have a tube, but I believe I've see the ID undergrads with tubes as well."

"Interesting, I've been working on a similar project for the last few months albeit much more labor intensive, haha. I 3d sculpt and make molds of mine, then cast them in the same resin so that the weight will be homogeneous all the way through. I imagine since theirs are all 3d printed you'd get the same effect. Them saying they control the balance to make there isn't bias is probably just marketing wank for "they're cube shaped, and also it really doesn't matter that much"Here's mine to compare https://www.instagram.com/p/CYutSx5hCri/"