Our Blix cups are single-use only. Once you have used it in with our Xi Machine, it cannot be used again. We recommend recycling or repurposing each cup after it's been used. Our Blix cups are made of PP (polypropylene) plastic material and are 100% recyclable. PP plastic has a low impact on the environment with no toxic waste, significantly less CO2 emission than other plastics, and its low melting point reduces the amount of energy needed to manufacture. Furthermore, it can be recycled to give life to new things like crates, garden furniture, and flower pots.