Hire Mobile Cool Roooms, Fridges and Freezers. Mobile Cool Rooms have an extensive range of mobile refrigeration for short or long term rental. Advanced Cool Rooms specialise in mobile fridges, freezers & commercial display units slush machines etc. Our mobile cool rooms are available in fridges and freezers. We offer cool rooms and freezers for both short and long term hire – they're ideal for parties, outdoor catering and special events.