This is an issue that still concerns me.
That you should put Tetra in the garbage, well ok ..... but why you can no longer hand in the yogurt and other plastic cups at Migros, I do not quite understand?

Well at that time some people disposed of sausage plastic packaging etc. in the bin.
Although this is also plastic.
I usually prefer to buy open, but with some types of meat (e.g. minced meat) I have also been directed to the shelf with the packaged meat.
So you should also be able to dispose of it.
Milk, shampoo etc is also possible.