Altoid tins seem to work well for this.

+1 on the small tin idea, but also this is what antique cigarette cases etc also really work well for, if you can find the right size, they fit perfectly in the pocket.

I know someone who uses a playing cards tin he got from a kickstarter campaign years ago, it's pretty cool too.

I stuff everything I need under my unusually tall meshback cap. It about 3x tall and is handy for transporting mints,wallets, phones, bananas, spare change, mice (and rats), dog poo bags, rice(and oats), spare shopping bags, booze, weed, threats, pleadings, memories, regrets, aspirations, fears, lice(and combs) and a random political promises.