trixie bottle wrench

We have some small bottles from Trixie for our children which we use daily.
Unfortunately they somehow tend to tighten them self pretty hard so we sometimes really struggle to get them open again.
As i'm trying to get better in my 3D-Modeling skills i thought this was a good opportunity.
After some iterations this was the final result. I tried it with two different bottles and it works flawlessly.

The opening is drafted a bit so it's easier to get on and off and also provide some leeway if the “wrench” gets loose over time maybe…

Hope this can be of use for someone else as well.

This is the kind of bottle this was made for: