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What New Microplastic Research Reveals — and How Smarter Cups Can Make a Difference

For many of us, a hot coffee or tea is part of a daily routine. But emerging research suggests that the cup itself may contribute more than just convenience. Recent findings show that disposable paper cups with plastic-based linings can release microplastics into beverages, particularly when exposed to heat.

What Are Microplastics — and Why Are Cups Involved?

Microplastics are extremely small plastic fragments formed when plastic materials degrade. Because most conventional paper cups rely on plastic or bioplastic linings to prevent leaks, heat and liquid contact can accelerate the breakdown of those linings during normal use.

According to research highlighted by the University of New Mexico Health Sciences Center, hot beverages served in plastic-lined paper cups were found to contain significantly elevated levels of microplastics, sometimes numbering in the thousands of particles per serving.

Why Hot Drinks Are the Biggest Concern

Temperature plays a critical role in microplastic shedding. Hot liquids increase the rate at which plastic-based coatings degrade, leading to greater particle transfer compared to cold beverages. This is especially relevant for coffee, tea, hot chocolate, and other heat-retained drinks.

Rethinking the Cup: Aqueous Coating vs. Plastic Linings

Traditional paper cups typically use polyethylene (PE) or similar plastic films as an internal barrier. Aqueous-coated paper cups use a water-based coating system designed to provide liquid resistance without relying on conventional plastic linings.

At beyondGREEN, this approach is part of a broader focus on material innovation, not just end-of-life claims.

Built for Real-World Use

beyondGREEN aqueous paper cups are engineered to meet everyday demands: sturdy rim, leak-resistant for hot and cold beverages, smooth drinking experience, microwave safe, suitable for both hot and cold drinks. Available in 12 oz and 16 oz, ideal for offices, cafés, events, and catering.

Practical Ways to Reduce Microplastic Exposure

• Reduce direct contact between hot liquids and plastic materials
• Choose packaging with lower plastic content where possible
• Support brands investing in material science improvements, not just marketing claims

Shop beyondGREEN Aqueous Paper Cups →

Sources

1. University of New Mexico Health Sciences Center. Cup contamination research reveals alarming microplastic levels in beverages. hscnews.unm.edu
2. Leslie, H. A. et al. Discovery and quantification of plastic particle pollution in human blood. Environment International, 2022.