A mathematical twist on a classic poem. Roses are red, violets are blue, d(uv)=u(dv)+v(du). What’s an outdoor party without a wine tumbler to keep a drink fresh and at just the right temperature? Forget breakable glasses—give this uniquely shaped wine tumbler a chance and have fun with friends without worry.

• 12 oz (355 ml)
• Tumbler size: 4.7″ × 3.5″ (12 cm × 9 cm)
• High grade stainless steel
• Double-wall vacuum seal
• Curved, unique shape