I used Spectrum Filaments PETG HT100 which has a temperature resistance of 100 °C.
Which means putting the cookie cutter inside a dishwasher is no problem.
Because this material is prone to warping in sharp corners, I also added a 3mf file which contains the cookie cutter and little helper disks which counteract the warping issue.
Normal PETG or PLA shouldn't have this issue.
The author marked this model as their own original creation.