Designed for aircraft mechanics who also embrace a secret ninja by night, this tumbler blends practical function with a playful identity twist. "Aircraft Mechanic By Day. Ninja By Night." is more than a slogan—it's the vibe you can carry from the hangar to downtime.

• Material: Black powder-coated stainless steel for a sleek, durable finish that withstands daily use in busy hangars and workshops.
• Engraving: Laser-engraved inscription of "Aircraft Mechanic By Day. Ninja By Night." at the front for a permanent, fade-proof look (not printed).
• Insulation: Double-wall vacuum insulation keeps hot drinks hot and cold drinks cold for hours on long shifts.
• Sizes: Available in 20oz and 30oz capacities to suit different caffeine needs and shift lengths.
• Lid: Clear, spill-resistant lid included; leak-proof design makes on-the-go sipping easy and quick to clean.
• Portability: Comfortable handle and a shape that fits most cup holders for reliable transport between gates, hangar floors, or training sites.
• Gift suitability: A unique, thoughtful gift for aircraft mechanics, colleagues, or family—great for Christmas, birthdays, or "just because."

This tumbler helps busy aviation professionals stay hydrated, focused, and prepared—whether they're wrenching on a jet, traversing a tarmac between tasks, or winding down after a shift. The durable construction and secure lid reduce spill risk in demanding work environments, while the laser-engraved message endures through frequent washing and rough handling. With two practical capacities and a timeless black finish, it doubles as a reliable work companion and a stylish travel mug for home, office, or on the go.