I found something to be quite useful for many things - bank deposit bags. I first bought a couple for my wife to use one to keep her tip cash in the safe. I used the other one as my commuting tool pack that goes in my backpack or other rack-mounted bag. I've since bought more and put all the important stuff for our car in it so they don't get beat up in the glove box.

Search Deposit Bag Bank Pouch on eBay and you'll likely find the seller I got mine from - they only cost about $3.50 each (sold in pairs).