BruMate Era 40 Custom Magnetic Topper

I found another model on here similar to this, but the issue was it twisted too easily and didn't sit flush onto the top of the cup due to the tiny fillet of the straw.

I re-created this and made it a little thicker, added a small relief for the straw and added a spot for 3 magnets. The magnets I used are 6mmx2mm round neodymium magnets. It isn't crazy strong, but will hold it on just fine with the combination of magnets and friction.

You can use magnets like these: https://a.co/d/fS7ilIU They will press fit into to the topper, but I added a drop of super glue in the hole just in case. Make sure you have the polarity correct!

I uploaded a default profile from BS, but I use Orca. YMMV.