Oh also worth mentioning for anyone who makes their own version - of the 8 that I made, 1 of the bottles was a little tight in the cutout. I think i used some sandpaper to loosen it up enough to not be bothersome. But if you're concerned about it you might want to increase the size of the cutout a little bit and/or cut a sample piece to check the fit.

Thanks! Magnets are not entirely necessary. The top slides over an inside edge so it will sit fine without the magnets. The magnets just allow for picking up the box from the top piece like is shown in the youtube link.

I'm a fan of Colorverse Gravity Wave

My personal grail is a Richard Mille RMS05 https://www.richardmille.com/collections/mechanical-fountain-pen