Sustainability has moved from a "nice to have" to a genuine expectation from event attendees, exhibitors, and corporate clients. Yet much of the advice available to event organisers is vague or impractical — "go paperless" and "use recyclable cups" barely scratches the surface.
This guide focuses on realistic, implementable steps for sustainable event catering — with a particular focus on coffee, which is one of the highest-impact catering categories.
Why Coffee Catering Has a Significant Footprint
Coffee production is resource-intensive: it requires water, land, and energy at every stage from farming to cup. At an event scale, the environmental impact compounds quickly:
- Single-use cups: The majority of event coffee is served in disposable cups, most of which are not recycled
- Dairy milk: Conventional milk is one of the highest-carbon food products per litre
- Waste coffee grounds: Large volumes of spent grounds typically go to general waste
- Packaging and consumables: Lids, stirrers, sleeves, and sugar packets all contribute
Understanding where the impact sits helps you prioritise where to act.
1. Start With the Cup
Single-use cups are the most visible sustainability issue in event catering. The good news is that alternatives are now well-established and practical.
Compostable cups: Made from plant-based materials, these break down in industrial composting conditions. They require a composting stream at your venue to be effective — confirm this before specifying them.
Reusable cups: Providing branded reusable cups — or encouraging guests to bring their own — eliminates disposable waste entirely. This works well at conferences where the same group of people attends all day.
Encourage BYO: A simple sign at the bar inviting guests to bring their own cup, with a small incentive (a free upgrade, for example), can meaningfully reduce cup waste at minimal cost.
Our mobile coffee bar hire packages can be configured to support any of these approaches.
2. Choose Responsibly Sourced Coffee
Not all coffee is equal in sustainability terms. Look for:
- Fairtrade certification: Ensures farmers receive a minimum price and additional social premium
- Rainforest Alliance: Focuses on environmental and social standards across the supply chain
- Direct trade: Some specialty roasters work directly with farms, cutting out intermediaries and often delivering better outcomes for farmers and the environment
Ask your coffee catering provider where their beans are sourced and whether they hold any certifications. A provider who can't answer this question clearly is unlikely to be prioritising sustainability.
3. Reduce Dairy Consumption
Dairy milk is the largest single carbon contributor in a cup of coffee. Offering — and actively promoting — plant-based alternatives is one of the most impactful steps an event organiser can take.
Practical steps:
- Make oat milk the default, with dairy as an option rather than the reverse
- Display plant-based options prominently on the menu board
- Avoid stigmatising dairy drinkers — the goal is to make the sustainable choice easier, not to restrict
Oat milk has become the standard in specialty coffee and is expected at premium events. It's no longer a niche request.
4. Manage Coffee Grounds
Spent coffee grounds are an underutilised resource. They are rich in nitrogen and can be composted or repurposed rather than sent to landfill.
Options include:
- Composting on-site: If the venue has a composting stream, grounds can go directly into it
- Partner with a grounds collection service: Several UK organisations collect spent grounds for composting or repurposing
- Donate to local gardeners or community gardens: Grounds are an effective soil amendment
This is a simple, low-cost step that your catering provider should be able to support.
5. Reduce Over-Catering
Over-catering is one of the most significant sources of waste at events. Ordering 20% more than you need might feel safe, but it typically results in significant food and beverage waste.
Better approaches:
- Use registration data to model consumption more accurately
- Plan service windows to smooth demand rather than serving everything at once
- Brief your catering provider on the likely guest profile — a conference of coffee professionals will consume more than a general corporate audience
A skilled catering provider will help you plan realistic volumes. Our team routinely advises on consumption planning as part of the exhibition coffee hire and conference booking process.
6. Reduce Packaging and Consumables
Beyond the cup, there are several low-effort reductions available:
- Remove individual sugar packets: Replace with a bulk dispenser or simply ask guests if they take sugar
- Eliminate plastic stirrers: Use biodegradable alternatives or simply ask guests to use the cup lid
- Reduce napkin waste: Place napkins in a holder rather than handing them out with every drink
- Avoid individual milk pots: These are almost always single-use plastic; use jugs or cartons instead
None of these changes are significant individually, but combined they meaningfully reduce per-cup waste.
7. Choose a Sustainability-Conscious Provider
The most effective sustainability decision you can make is to work with a catering provider who takes these issues seriously. Ask prospective suppliers:
- What is your sourcing policy for coffee?
- Do you offer compostable cup options?
- How do you handle grounds and waste?
- Can you support a bring-your-own-cup initiative?
- Do you hold any environmental certifications?
A provider who can answer these questions clearly and specifically is a meaningful partner in your sustainability goals.
Building a Credible Sustainability Story
Sustainability in event catering isn't just about reducing harm — it's also a communication opportunity. Event attendees increasingly notice and value genuine sustainability commitments.
Document your choices: the cup material, the milk options, the sourcing certification. Share it in your event programme or on your event website. This demonstrates that your sustainability commitment extends to every aspect of the event — including the coffee.
Start with the steps that have the most impact (cup choice, milk policy, responsible sourcing) and build from there.