Woot offers Thermos Stainless King 24-Ounce Drink Bottle, Slate for $18.50 (orig. $26.99) free shipping with Amazon Prime.

Product Description:
A must-have for camping and outdoor enthusiasts. Equipped with vacuum insulation technology to keep drinks hot for 18 hours and cold for 24. High quality 18/8 stainless steel construction is dependable any time of year for long treks or road trips. The vented lid with wide drinking lip helps control the flow of liquids, which makes it ideal for hot beverages. The lid also has a push button with locking ring that helps the lid stay leak-proof when locked closed. Exterior stays cool to the touch with hot beverages and sweat-proof with cold. THERMOS brand drink bottles are dishwasher safe, top rack recommended.