Fuckin’ Slayer! is the battle cry of legions of metalheads all over the world. Epic, genre defining and ground-breaking, these guys take no prisoners and do whatever it takes to reign in blood.

Battle-tested
More than 25 million happy customers since 2009.

Stackable storage compartment 
Carry your protein powder separately.

Leak-proof 
100% guaranteed by our Smartshake™ Warranty.

BPA and DEHP Free
Safe for the environment and yourself.