[Realistic Spark Plug Replica] Features an authentic,full-scale spark plug design crafted from safe resin. The exterior captures every mechanical detail of an actual engine component for true automotive appeal. [Stainless Steel Inner Liner] Equipped with a high-quality stainless steel interior that provides superior temperature retention for both hot and cold beverages while ensuring easy cleaning and lasting durability. [Secure Double-Wall Construction] The innovative resin exterior and stainless steel interior combination creates a sturdy,insulated barrier that keeps drinks at ideal temperatures and comfortable to hold. [Practical Capacity] Generously sized to hold your favorite morning coffee,afternoon tea,or refreshing cold drinks. Perfect for garage sessions,workshops,or daily office use. [Perfect for Automotive Enthusiasts] An exceptional gift for mechanics,car collectors,and motor sports fans. Makes an unforgettable present for birthdays,holidays,or professional milestones in the automotive industry.