Food safety regulations have been designed to prevent the spread of communicable diseases like COVID19. While some cafes temporarily stopped accepting reusable cups during the height of the pandemic, the evidence is now clear that a single-use cup is a poor substitute for a KeepCup that is properly cleaned by its owner.
Cafes that implemented short term reusable cup bans have usually done so voluntarily rather than in response to food safety directives. These changes were introduced at a time when the world knew less about the spread of this new virus than it does now.
Sanjaya Senanayake, Associate Professor of Medicine at the Australian National University has confirmed that there's no proven benefit to using disposable cups instead of reusables. Single-use cups are not a sterile fix-all. They can harbor viruses and bacteria and, as highlighted by Upstream, "are subject to whatever pathogens have settled on them from manufacture, transport, inventory stocking, and eventual use.”
The World Health Organisation, states that hand washing is one of the best ways to combat viral spread.
The same approach applies to all reusables. Clean hands. Clean KeepCup.
“If you’re regularly cleaning stuff, you should be fine. I wouldn’t expect any virus to survive a dishwasher.” ~ Vineet Menachery, Assistant Professor of Microbiology, University of Texas Medical Branch
Likewise, we know that it’s extremely unlikely to contract airborne viruses from surfaces.
“We haven’t had a confirmed case of contact transmission of SARS-CoV-2, which is the virus that causes covid-19, since this has all been occurring. You really are almost at a nil risk of getting surface contact transmission of this.” ~ Dr Ben Locwin, Epidemiologist and COVID19 Policy Advisor to the CDC.