My receipt burden was reduced tremendously when my company's expense system integrated with AmEx. As long as I charge expenses on my AmEx they are automatically imported and I don't need to provide receipts. It's worth an inquiry to your HR/accounting department.
Prior to that I had a
Tumi travel wallet - a giveaway at an internal conference - that held everything - FF cards, tickets (way back when), spare change, receipts, etc., and it was always in my bag.