A method for applying a foam to a paper web is provided. The tube member is rigid and has a thin wall structure capable of piercing and penetrating a variety of food items and retaining the food items for future deposit into a second food item. The n-type semiconductor layer, the p-type semiconductor layer, and the p-type region are made of wide-gap semiconductors with a bandgap of at least 2eV, respectively. As a result, the dose of hypnotic agent is rapidly and efficiently absorbed by the oral mucosa with surprisingly low inter-subject variability. The padding and much of the backing panel is covered with a weather-resistant fabric, preferably by wrapping. The two partial blades are interconnected in one piece at their ends, to encompass a loop surface extending essentially crosswise to the main direction of flow, through which the fluid flows.