Meet the "Scientist By Day. Ninja By Night." tumbler — a stainless steel, powder-coated cup built for scientists who power through lab days and unwind with style. This vacuum-insulated tumbler keeps drinks hot or cold for hours while the witty print adds a playful touch to daily routines.

• Material: Stainless steel with a durable powder-coated finish for lasting everyday use.
• Capacity: Available in 20oz and 30oz sizes to fit any caffeine habit or hydration need.
• Insulation: Vacuum-insulated design that keeps beverages hot for hours and cold for longer periods.
• Print: Laser-engraved slogan — "Scientist By Day. Ninja By Night." — for a lasting, smear-resistant design.
• Color: Sleek black exterior that looks professional in the lab and on the go.
• Lid: Included tight-fitting lid to reduce spills during commutes and meetings.
• Care: Built to be durable and easy to clean, ideal for daily use in busy schedules.
• Gift-ready: A thoughtful, humorous gift for Fathers Day, birthdays, or any scientist who loves coffee or tea.

This tumbler is more than just a vessel—it supports a scientist’s daily routine by keeping beverages at the perfect temperature, reducing the need for constant refills, and adding a touch of personality to every scenario. Ideal for lab days, fieldwork, conferences, or quick coffee runs, it helps professionals stay focused and energized from the first sip to the last. Whether you’re buying for a colleague, a student, or a friend, this reusable, high-quality tumbler communicates appreciation with a smile while delivering reliable performance day after day.