Grey/Blue Canteen Cover-Airforce?

Cannot post pics up and not that up on all things Dutch but have recently bought what I havent seen before,a grey/blue canteen cover and wanted to know who would have used it please and what type of correct period canteen would have been carried in it.

To the rear is stamped----


M. v. O.

Nr. TL-AT 2035 M/II
Rompa & Zonon 1954


Thanks