I saw the initial design and completely felt the pain about that little red straw being always all over the place, so I liked it but browsing through my can's I found out, that I only have 150ml and 250ml can's of WD-40. And yes, there are already some straw holders for this size, but only for one straw....
...as you can see on the picture I also have a straw set up with the Z Rod Grease Can Focuser of HenrytheV https://www.thingiverse.com/thing:4866809, which helps lubing the z rods and the 8mm rails...
...so finally I decided to do a double straw version.
Basic TPU works perfect, but you should be able to print in PETG or even PLA.

Also check out my mangnetic clip (6mm diameter 3mm high mangent) https://www.thingiverse.com/thing:5388065