Create a highly stylized 2D digital illustration of a small, round robot named Robo, standing beside a recycling bin in a futuristic, clean cityscape. Robo should be no taller than a teacup, with a shiny, silvery body and large, expressive blue eyes that light up with curiosity. The illustration should have a whimsical and playful style, using bright and cheerful colors to emphasize Robo’s cute design. Include details like his tiny arms holding a plastic bottle and a small smile on his face. The recycling bin should be labeled clearly, and the background should feature sleek, futuristic buildings with hints of greenery, suggesting an eco-friendly environment. Use soft, diffused lighting to create a friendly and inviting atmosphere, with a shallow depth of field that focuses on Robo and the recycling bin. The overall mood should be lighthearted and educational, capturing Robo’s determination to keep the city clean.