Using this dinnerware set is a breeze. Just expand the bowl or cup when you're ready to use it. For eating, the rims on the bowls and the central ring on the cup give you a firm hold. After use, simply collapse them back into a compact shape to save space in your backpack. When it comes to cleaning, you can wash them with mild dish soap and water. Make sure to dry them thoroughly before packing them away. Avoid using abrasive cleaners as they may damage the EU food - grade materials. Also, don't expose the set to extreme temperatures for long periods as it could affect the durability of the collapsible design.