Walmart – Tiange Li – 2025

Summary

Tiange Li developed and de-risked Walmart’s sustainable material transition strategy for footwear and toys, enabling scalable decarbonization.

Goals

Tiange’s fellowship aimed to identify commercially viable sustainable material alternatives for Walmart’s footwear and toy categories. The project assessed the feasibility of integrating recycled and bio-based materials to reduce carbon footprint while maintaining cost competitiveness, product safety, and scalability. This supported Walmart’s Gigaton Goal and broader commitment to becoming a regenerative company.

Solutions

Tiange conducted a techno-economic analysis comparing traditional materials with sustainable alternatives like rPET, recycled rubber, and bio-based EVA. They developed a dynamic cost model incorporating material premiums, process adjustments, carbon tax savings, and consumer willingness-to-pay. Additionally, Tiange established a multi-criteria supplier evaluation framework to identify partners meeting Walmart’s compliance, capacity, and sustainability standards. The methodology integrated lifecycle carbon data, safety certifications, market intelligence, and performance testing to de-risk adoption. A phased implementation roadmap was created to prioritize high-impact categories and suppliers.

Potential Impact

Tiange’s work secured five pre-vetted suppliers for footwear and six for toys, mitigating future regulatory and supply risks. The cost model will reveal a manageable cost increase, offsettable via carbon incentives and brand premium. The framework provides a replicable strategy for expanding sustainable materials into apparel and home goods, accelerating Walmart’s circular transition.