[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.