The crossword solution for the term 'Plastic Cup Brand' is SOLO, a four-letter word. SOLO is a brand of plastic cups and other disposable tableware products that has been around since 1936. The company is based in the United States and produces a wide range of products, including cups, plates, bowls, cutlery, and more. SOLO is known for its quality and durability, making it a popular choice for parties and other events.