Quick answer: PLA cups are clear cold cups made from plant-based plastic. Certified PLA (BPI, tested to ASTM D6400) breaks down in commercial composting facilities that accept it, but not in landfills, most backyard piles, or recycling bins, where it's a contaminant. PLA is cold-only. It makes the most sense where you or your customers have access to commercial composting that takes it.
Key takeaways
- Plant-based ≠ compostable anywhere. PLA needs commercial composting.
- PLA looks like PET but contaminates recycling.
- Cold drinks only: PLA softens with heat, including hot storage rooms.
- Without composting access, PP or PET cups may be the more honest choice.
What PLA is
PLA (polylactic acid) is a bioplastic made from fermented plant sugars, often from corn or sugarcane. It can be molded into clear cups and lids that look almost identical to PET plastic. That resemblance is both its appeal and its biggest problem.
The pros
- Plant-based feedstock rather than fossil fuels
- Clear and attractive, comparable to PET
- Certifiable as compostable under ASTM D6400. BPI certification requires independent lab testing to ASTM D6400 or D6868.
- A good fit for closed systems like campuses, stadiums, festivals and offices with commercial compost collection
The cons
- Needs commercial composting. Most commercial facilities run hotter and more consistently than home piles.
- Not every composter accepts it. Some facilities don't take packaging at all.
- Contaminates recycling. Customers can't tell it from PET, and sorting equipment may not either.
- Heat sensitive. PLA softens at relatively low temperatures, so keep it out of hot cars, sunny windows and hot storage rooms, and never use it for hot drinks.
- Usually costs more than conventional cold cups.
Where PLA actually composts
Before you switch, answer:
- Does a commercial composter serve your area? Search FindAComposter.com, a database of U.S. and Canadian composting facilities.
- Does that facility accept compostable packaging, specifically PLA cups? Call and ask.
- Will your cups end up there? On-site compost bins help for dine-in; to-go cups often travel to homes and offices without composting.
If the answers are mostly "no," PLA cups will likely end up in landfill or contaminate recycling.
PLA vs. PET vs. PP at a glance
| PLA | PET (#1) | PP (#5) | |
|---|---|---|---|
| Feedstock | Plant-based | Fossil-based (PCR options exist) | Fossil-based (PCR options exist) |
| Clarity | Clear | Crystal clear | Slightly hazy to clear |
| End of life | Commercial compost (if accepted) | Recycling where accepted ("check locally") | Widely recyclable as of 2026 |
| Heat | Cold only | Cold | Wider range |
For a deeper comparison, see our PET vs PP vs PLA guide.
What customers value
Consumer research suggests people prioritize recyclability. In McKinsey's 2025 U.S. survey, recyclability ranked as the most important packaging sustainability attribute (77%), ahead of biobased materials (49%). That doesn't rule out PLA, but it does mean a clearly recyclable PP cup may resonate more than a compostable cup that can't be composted locally.
Cost and storage considerations
PLA cups usually cost more per unit than conventional cold cups, so run the per-drink math (cup, lid and straw) before switching. Our cost per drink guide shows how. Storage matters more than usual too: because PLA softens with heat, a stockroom next to the ice machine's exhaust or a sunny window can warp cups before you use them. Keep cases cool, off the floor and rotated first-in, first-out.
If composting isn't available
You still have good options:
- PP cold cups, now widely recyclable in the U.S., with matching PP lids
- PET cups with recycled content, labeled "check locally"
- A reusable cup program with a small discount for customers who bring their own
- Fewer single-use add-ons: strawless lids, straws on request, napkins at the counter rather than in every bag
The most sustainable cup is often the one that matches what your customers can actually do with it afterward.
If you choose PLA, do it right
- Use certified products and keep certificates on file.
- Set up labeled compost bins for dine-in customers.
- Train staff to explain how to dispose of the cup.
- Word claims carefully. Under the FTC's Green Guides, qualify compostable claims when commercial facilities aren't available to most customers: "Compostable in commercial facilities, which may not exist in your area."
- Match the lid. A PLA cup with a non-compostable lid undercuts the message.
- Store cool. Keep cases away from heat.
Our compostable vs. recyclable guide and BPI certification explainer cover the rules in more detail.
Choose the right cold cup with Affogato Bean
We'll help you pick the cold cup that fits your menu and your town (PLA, PET or PP) and brand it, with design help included. See cold cups or request samples.
General information, not legal advice.
Frequently asked questions
Are PLA cups compostable?
Certified PLA cups are designed to break down in commercial or municipal composting facilities that accept them. They generally don't break down in landfills or most backyard compost piles.
Can PLA cups be recycled?
Generally no. PLA looks like PET plastic but is a different material, and it can contaminate plastic recycling streams. Don't put PLA cups in recycling bins unless your local program specifically says to.
Can PLA cups hold hot drinks?
No. PLA softens at relatively low temperatures, so PLA cups and lids are for cold drinks only. Hot cups described as compostable typically use a PLA lining on paper instead.
How do I know if a PLA cup is really compostable?
Look for third-party certification, such as BPI, which requires independent testing to ASTM D6400 for plastics. Ask your supplier for the certificate for the specific product and size.
Sources
- Biodegradable Products Institute / NSF, “BPI Compostable Products Certification Program (white paper).”
- eCFR / Federal Trade Commission, “16 CFR Part 260 — Guides for the Use of Environmental Marketing Claims.”
- GreenBlue / How2Recycle, “More Than 60% of U.S. Households Can Now Recycle Cold To-Go Cups Curbside.”
- BioCycle, “Find A Composter Is Live Again.”
- McKinsey & Company, “Do US Consumers Care About Sustainable Packaging in 2025?.”
Sources checked October 2026. Statistics are reported as published by each source.