When you land at Istanbul, Ankara, Izmir, Tbilisi, Milan or Manila, look out for the big yellow (Israeli) TravelersBox machines. Deposit your spare foreign coins and notes and convert them into digital currency. Coming soon to Brazil and (of course) Tel Aviv.

http://www.globes.co.il/en/article-converting-foreign-coins-into-digital-currency-1001029139

http://www.globes.co.il/en/article-tax-refund-giant-global-blue-invests-in-start-up-travelersbox-1001035550

https://www.youtube.com/watch?v=UiNj4cPwoJE