The reusable coffee cup guide (and why we still recommend Fressko first)

Frequently asked

What size reusable coffee cup should I buy?

The right reusable coffee cup size depends entirely on your preferred coffee order. For piccolos, flat whites, or short blacks, our long-term testing recommends a 227ml cup like the Fressko Bino. If you prefer a large flat white or a small latte, opt for a 340ml size like the Fressko Camino. Anything over 500ml is best left to drink bottles rather than standard cups.

What is the best material for reusable coffee cups?

Borosilicate glass is the best material for reusable coffee cups because it offers the cleanest taste, resists thermal shock, and is dishwasher safe. In our bench testing, borosilicate glass outperformed 304 stainless steel, which can introduce a slight metallic note. We advise avoiding plastic or bioplastic altogether, as these materials quickly stain, retain old coffee flavours, and age poorly.

Which reusable coffee cup lid is easiest to clean?

Twist-off lids are the easiest to clean and the most hygienic option. Our bench testing shows that twist-off lids provide the best overall taste experience and are far easier to sanitise than flip sip lids, which feature hard-to-reach crevices. For proper maintenance, manufacturer specifications recommend replacing your lid's silicone gaskets every 12 to 18 months to prevent leaks.

What is the best reusable cup for milk coffee?

The Fressko Camino 340ml is the best reusable cup for milk-based coffees like lattes or large flat whites. During our long-term testing, Fressko cups consistently came out on top due to their high-quality materials and smart lid design. To keep it in peak condition, place it on the top rack of the dishwasher and ensure you remove the sleeve before microwaving.

Why should you avoid plastic reusable coffee cups?

You should avoid plastic and bioplastic reusable cups because they stain easily, retain stale coffee flavours, and age poorly over time. Our bench testing confirms that plastic cannot match the durability or taste purity of borosilicate glass or 304 stainless steel. For a long-lasting cup, look for glass or stainless-steel inners paired with a protective outer sleeve.

How often do you replace reusable coffee cup seals?

You should replace your reusable coffee cup's lid gaskets every 12 to 18 months to maintain a proper leakproof seal. According to manufacturer specifications, these silicone components degrade over time with daily use and regular washing. For daily cleaning, we recommend washing your cup on the top rack of the dishwasher and avoiding microwaving it with the protective sleeve on.

Sources & evidence

Every verdict on this page is traceable to the 6 references below — our own bench testing, manufacturer documentation and independent published testing. Where evidence is thin, we say so in the text rather than rounding up.

1. Manufacturer specifications and warranty terms (madebyfressko.com and equivalents)
2. The Reusable Edit bench testing protocol: thermal retention, leak, drop and 200-cycle wash simulation reusableedit.com/about
3. Clean Up Australia, Rubbish Report 2024 www.cleanup.org.au/rubbishreport
4. The Reusable Edit scoring methodology reusableedit.com/about
5. The Reusable Edit testing and scoring methodology reusableedit.com/about
6. Answer library and machine-readable data feed reusableedit.com/answers

Evidence last reviewed July 27, 2026.