Huge purses...

[Luxury-Taco]

I think cars serve as handbags for dudes. If you are in a guy's car and you peek into the storage under the middle arm rest, you'll likely find all types of things you might associate with a handbag. The things you mentioned are all there (water, small bills, case for glasses + backup glasses), lots of receipts, maybe an engraved man-bracelet, unopened mail, a book, a firearm, a wallet, old credit cards, a couple thumb drives, some lists of things to do, etc.