The Bullet Summit 18oz Mug with straw features double wall vacuum insulated construction designed to keep beverages hot for up to 5 hours or cold for up to 15 hours. It is crafted from 91% recycled stainless steel liner and the standard-stainless steel outer, plus a condensation-resistant exterior. It is designed to give you ultimate hydration versatility. Choose your method of drinking with ease, slide open the large closure for swig and slide open the small closure to insert the reusable straw for Sip. The Summit mug includes a spill-proof press-on lid, together with an individual straw that is an eco-friendly, environmentally responsible, and sustainable alternative to disposable ones. Hand wash only. 18oz.