AmazonBasics 16oz Disposable Plastic Cups – 240-Pack – Link

Amazon has this currently marked down to $11.34.

• 240 transparent plastic party cups
• Each cup holds 16 ounces of your favorite cold beverage
• Stacked together and wrapped in individual sleeves for easy handling
• Ideal for parties, as well as home or food-service use
• Disposable—no cleanup necessary