The wide mouth opening is perfect for ice and for easier cleaning. And the screw-on cap with a flip-up carry ring makes it easy to grab and go! Keeps drinks cold up to 24 hours and hot up to 12 hours Holds up to 20oz Fits most standard cup holders Dishwasher safe, top rack only Slip-free, scratch-free and noise-free silicone base Includes BPA-free screw-on cap with flip-up carry ring Triple insulation technology: double-walled, vacuum-sealed and copper-plated Condensation free and non-breakable Constructed of 5mm 304-18/8 stainless steel