If you own a Hollywood sport rack automobile hitch rack (sold also by performance and Price Point as well as others) with adjustable wheel hoops and adjustable hooks to hold the top tube of your bike........and if you travel with the rack empty............any untightened adjustment knobs will vibrate loose and fall off. Fear not, you can buy more from "Hollywoodracks.com" (yes it takes some nerve to go to a website with a name like that). Save the money, tighten the knobs before you lose them.
If you think that you might like an aluminium water bottle (or any other metal bottle) be advised that they rattle in most bottle cages like the chains of Christmas Past. (I got mine Christmas Past so this may not be unreasonable)
Think you might want to try a tinted visor on you helmet? It is amazing how hot it gets in there without wind flow.........
Tag your it.