These plastic tumbler cups are super easy to use. Just take one out of the pack and fill it with your favorite drink. They're perfect for parties and events. When you're done, since they're disposable, you can simply throw them away. However, remember they're not safe to use in the microwave or dishwasher. For storage, keep them in a dry place away from direct sunlight. This will help keep them in good condition until you're ready to use them again.