Just keep the change.

[Wicked3DS]

I keep it in a jar and then take it to the bank and cash it in when it fills up. Boom, I pocketed some extra money.

 

[Honest]

I usually stuff everything that isn't pennies into my pocket (I have a phone wallet, so no actual thing to carry coins). It comes in useful when I'm attempting to buy something small and don't want to use a bill.

 

[Coffee]

When i was a kid, i saved my money in a jar. Now i save my change in a small envelope.

 

[Bellsprout]

I'm usually on top my change because it adds up and I am poor, but I typically tip every other time I get a coffee

 

[Suicune]

I rarely receive change anymore since I'm always using a card, but when I did I'd usually let the employee keep the change up to a couple dollars, or donate.

Lately I've gotten a bit... wary? About getting exact change on orders and such when I know I have to use cash, so I've been wanting to keep loose change in a piggy bank to catch that .77 cents on my purchase.

 

[Livewire]

I have a change bowl and home to collect the odds and ends after I pay cash for things, although I prefer to use exact change so I have more paper money instead. I know I have a shit ton of quarters right now that I could use for something.

 

[Legobricks]

I hoard it like the hoarder I am and do absolutely nothing with it but leave it in piles on my desk like some sort of new-age dragon.