Big mug energy, lid included. The Big Bertha Mug is a 16oz insulated stainless steel coffee mug with a twist-on lid that keeps splashes contained when upright — perfect for sipping while you scroll, type, or stare into the middle distance. This PURE-tier mug brings food-safe 18-8 stainless steel inside and out and double-wall vacuum insulation with a thermal copper lining that holds your morning brew at coffee-shop temperature for hours. The sassy sayings on the outside make sure everyone around you knows exactly what kind of day it is. BPA-free, dishwasher safe, fully unbothered.