It does what it needs to do, but if it were a little wider for the plastic cups from the canteens, it would be even better.

Very good, it securely holds the plastic coffee cups from cafes, but struggles a bit with the width, without meaning that it doesn't fit them. Moreover, it has an opening as shown in the picture, with a little pressure, it works. It doesn't fit in a 32mm handlebar, so I manage to fit it on the top pole, the one of the umbrella.