Why Fressko keeps winning our reusable cup tests

Quick answer

Fressko wins our tests because it commits to three things most competitors compromise on: borosilicate glass inners, twist-off lids and replaceable parts. The result is a cup that tastes cleaner, cleans better and lasts longer.

The three things they get right

1. Glass inners

Borosilicate is thermally stable, does not retain flavour and does not react with acidic drinks (hello, coffee). Steel is fine. Plastic is not. Glass is the honest choice, and Fressko commits to it across the range.

2. Twist-off lids

Sip lids feel convenient, but they hide gunk. Fressko's twist-off design means you can actually see and clean every surface. Fewer plastic-on-plastic seals to fail, too.

3. Replaceable parts

Every gasket, sleeve and lid is available as a spare. This is the single biggest predictor of whether a reusable will last a decade or land in landfill in 18 months.

Where they still have room

We would love to see a sip-lid variant that keeps the twist-off cleanability. And more colourway options for the Bino would not hurt.

The bigger point

The reusable cup market is full of clever industrial design that fails after 18 months. Fressko is boring, replaceable and repairable. That is what "sustainable product design" is actually supposed to look like.