The Eridium Slot Machines are a minigame in Borderlands 2
These slots take Eridium instead of regular money.
Introduced in Tiny Tina's Assault on Dragon Keep DLC
Tiny Tina's Lootsplosion
Cost per spin
Because Eridium is better than money, these slot machines generally give better stuff.
If you get 3 Psycho Heads, Flesh-Stick shocks you (instead of grenades), 3 purple vault symbols give you a pearlescent weapon, 3 Rainbows give you varying amounts of cash (Usually a decent amount) dependent upon your level, 3 teapots give you a blue weapon around your level