Support improves vessel stability Dysphagia (Parkinson's)

I bought some plastic glasses, special for dysphagia, the problem is that they weigh very little, I designed this support to be able to put the glass inside and improve its stability, so that the person who uses it is more independent. 
The glass fits just right, I gave it 1 millimeter more diameter to the cavity, at the end I will glue it so that it does not come out of its place.
The plastic glass was bought on Amazon, it has a height of 12 cm and a diameter of 7 cm.
It is printed in white PETG from prusa, in the printing configuration it has rough skin, to improve grip.