Change 1 Bouchon Yop pou Rs2 Credit Orange. Since the start of the promo, I have collected some 25-30 bouchons (bottle caps) and I will soon exchange them for Orange Mobile Credit... Btw, before the promo, I usually bought a Yop at around Rs17-18 daily, but then I discovered that in hypermarkets, the same Yop are sold for Rs11-13!