This was a project we did that involved creating a cup the way we want and it could include anything we could think of. We basically made the cup better. Something I added was a small blender at the bottom that does not involve metal blades. It is instead like iiplastic rods that go at the bottom and it wont make a smoothie it will just mix stuff like nesquick and milk or water and lemon juice. I also includes a small motor in a compartment under the cup which is completely safe from getting wet and causing harm. Its energy source will be a small solar panel on the side of the cup. Lastly it will include a detachable straw and at the same time can go up or down in other words it is retractable. You be sucking out some lemonade  or drink some water