MUKOKO 32oz Glass Water Bottles with 2 Lids-Handle Spout Lid&Bamboo Straw Lid, Motivational Water Tumbler with Time Marker Reminder and Silicone Sleeve, Leakproof-Olive-1 Pack

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• Ideal gift for a math or physics student, scientist, or computer programmer. Does not work as mousetrap.
• From Cliff Stoll, the Klein bottle guy - made from quality, low expansion borosilicate glass - microwave safe. Clear, non-colored, transparent glass.
• Zero volume, one-sided, nonorientable, 3-dimensional, unbounded, locally Euclidean
• About 8&#34
• tall, 4&#34
• diameter (20x10cm), weighs about 8oz (230g), ∇·B=0 and ∇×E=−dB/dt
• Rustproof, Batteries not needed, Riemannian, baryonic, satisfies Gauss-Bonnet theorem, free of any magnetic monopoles.

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