21. He never enters a situation unprepared.
In addition to being on hand to supply snacks, Sheldon's also dependable for other necessary—and not-so necessary—sundries, like bug spray, hand sanitizer, and a survival. So, whether you're camping in a cabin or heading to the grocery store, this guy's middle name is "Semper Paratus."
(Okay, Sheldon's real middle name is Lee, but you get the point.)
Watch the Season 10 premiere of The Big Bang Theory on Monday, Sept. 19 at 8/7c on CBS and CBS All Access.