Do we have any better alternatives for paper cups that are biodegradable?

There are several promising alternatives to traditional paper cups that are more environmentally friendly and truly biodegradable or compostable. The key issue with standard paper cups is that they are lined with a thin layer of polyethylene (PE) plastic to make them waterproof, which makes them very difficult to recycle or compost.

Here are some of the most prominent and better alternatives:  

1. Paper Cups with Bio-based Linings (PLA and Aqueous Coatings)

Many of the “eco-friendly” paper cups on the market today are still made of paper, but they replace the traditional plastic lining with a plant-based alternative.

• PLA (Polylactic Acid) Lining: This is a bioplastic made from renewable resources like corn starch or sugarcane. It provides the necessary waterproof and heat-resistant barrier. While these cups are considered compostable, they typically require an industrial composting facility to break down effectively due to the high temperatures needed.
• Aqueous Coating: This is a newer, water-based dispersion coating that is applied like paint and absorbed into the paper fibers. It uses less material than other coatings and is designed to be home compostable and recyclable. Some companies are now offering cups with this technology.

2. Cups Made from Other Plant-based Materials

Beyond paper, there are alternatives made entirely from different plant fibers, which can be highly effective.

• Bagasse Cups: Bagasse is the fibrous residue left over after sugarcane is crushed to extract its juice. These cups are strong, biodegradable, and can handle both hot and cold liquids. They are often noted for their ability to decompose relatively quickly, even in home composting.

• Bamboo Fiber Cups: Bamboo is a rapidly renewable resource that requires minimal water and resources to grow. Cups made from bamboo fiber are strong, biodegradable, and a good alternative to both plastic and traditional paper cups

3. Truly Biodegradable Plastic Cups (PLA)

While paper cups are a primary concern, single-use clear plastic cups also have a large environmental footprint. The alternative for these is also often made from PLA.

PLA Plastic Cups: Clear cups for cold drinks, like smoothies and iced coffees, are now commonly made from PLA. They have the look and feel of conventional plastic but are compostable in industrial facilities. They are not suitable for hot liquids.

4. The Best Alternative: Reusable

It’s important to remember that even the most “biodegradable” or “compostable” single-use cups still require resources to produce and a proper waste management system to break down. The most sustainable and effective alternative is always a reusable cup. Many coffee shops and businesses now encourage or even incentivize customers to bring their own reusable cups, often offering a discount.

Above example from the world’s best music festival.

You would need to use the above cup quite a few times in order to balance out the carbon footprint. . . . but not hard as would last a life time, even if you loose it, someone else will make use of it.