Cruz del Sur, one of the best Peruvian bus companies. Actually was in this bus where after riding from Arequipa to Lima I found out the bus helper put a box of shramp on top of my backpack. My backpack was completely wet with shramp stuff. I complained to the company manager, they apologized to me, washed my backpack and gave me free lunch. It´s been months since then, I´ve washed my backpack more than 5 times and it still smells like shramp :-(