We can get a mount for 24 hours from the daily boxes.
But the problem is, that the timer of the mount starts running as soon as you open the box.
And when you open more than one box and get two or three or more mounts... they are all gone the next day. What a waste!
So my suggestion is, to start that timer when the mount is used for the first time.
Then you can use it for 24 hours... it wil die... and you can use the next mount.