I work in a bikeshop and this female customer is there to pick up her specialized Epic in a large. Since the shop is empty I offer to help her to pack the bike in the car(before I see her car in the parking lot). A freaking Toyota Aygo ! She was able to pack the bike in the car only with the front wheel off and close all doors.

drain it, and let it dry. It’ really depends on the amount left from the first day. If past half full I tend to drink the rest so I waste a bit less.

tip: if you use sugary stuff in your bladder you should let it hang dry then put it in the freezer for the night(empty) and take it out an hour before you leave for the next ride. it minimizes the bad taste.
a colleague fill it up 100% with water instead to do the same trick but change it for new water before his ride. -too much waste for my liking and the freezer is already running..