Hi Abby. Thanks so much for reaching out! We'd love to collaborate with your team. When the cups are returned we cut out the stainless and add our our recycle bin. Once this reaches a certain volume we then send to a recycling facility that breaks the items down into siloxanes where they are depolymerized to make silicone oil used as lubricant for industrial machineries, water repellants, sealants and so forth. I'll reach out via email!