Thermos: Mathematics by Cognitive Surplus
Here's a flask to fuel your next mathematic breakthrough. It'll keep your coffee steaming hot throughout the longest of problem sets and most complicated proofs. Designed to keep your hot teas hot and iced teas cold.
Volume: 18 ounces
Opening: Wide Mouth
Material: High-grade stainless steel
Cap Material: BPA-Free Plastic
Care: Hand Wash (do not wash in dishwasher)