Modular Water Bottle / Thermos rack

Thanks to bjamdesign for the original.

This is a refactor from scratch using 3/8" / 10mm dowels.  I used 6" long ones from Amazon to avoid any need for cutting.  

My parts ended up a few millimeters larger on each side (I optimized for my 32oz Camelbaks) so unfortunately they won't fit together with bjamdesign's parts.

There's a good bit of variation in dowel dimensions even within the same bag, and certainly from different suppliers.  I've attached a parameterized f3d file if you need to make adjustments.  Be aware the tolerances for the keys to fit the pieces together is pretty tight so if you just change scaling in the slicer it may not work well.

I couldn't figure out the trick to printing stacked multiples, but an Ender 3 will crank out 4x of the big parts (i.e. 2 bottles worth) and piles of the little ones for the top, so it's not so bad.