League of Legends lets you buy everything from experience boosts to new champions with real money through Riot Points - or RP - but the typical limits of a close digital economy mean you don't have many opportunities to get a deal on those points. There's at least one way to get a substantial discount, though: Coca-Cola in Turkey.
Coke has put out a fresh line of bottles featuring a massive array of League champions. Each bottle comes with a redemption code that unlocks a chest and key worth 200 RP. As Reddit user infest-- notes, you can get those bottles for around 1.75 Turkish Liras, which comes out to around .25 EUR or .38 USD depending on the exchange rate of the day.
That's a fraction of the normal RP costs in every region, even Turkey itself, where 400 RP comes out to 12 Liras. Just exercise caution if you're looking to import a whole lot of Turkish soda - don't be surprised if those codes all turn out to be region-locked.
The bottle designs are very cool, at least.
This promotion has been around for at least a few months, and the bottles are available in a variety of Turkish convenience stores and fast food restaurants.