Yes, you are absolutely allowed to eat your own food on Deutsche Bahn's high-speed ICE (Intercity-Express) trains. In fact, most passengers in 2026 bring their own snacks, sandwiches, or full meals on board to save money or enjoy a specific diet. Every seat is equipped with a fold-down tray table (or a large stationary table in the "tisch" sections) to make dining comfortable. In First Class, you can even order food from the onboard "Bordbistro" or "Bordrestaurant" menu and have it served directly to your seat at no extra delivery charge. While you are free to eat, it is a significant part of German train etiquette to avoid bringing food with "intense" odors—such as hot fish, heavy garlic, or very spicy dishes—out of respect for your fellow passengers in a confined space. You are also allowed to consume your own alcoholic beverages, though public intoxication is strictly discouraged. If you choose to dine in the dedicated dining car (Bordrestaurant), you can enjoy a sit-back experience with porcelain plates and metal cutlery, making the ICE train one of the most civilized and flexible environments for dining while traveling across Europe at 300 km/h.