I had been looking at the Katadyn BeFree Tactical filter and collapsible bottle.

https://www.katadyn.com/en/de/50541-8020426-BeFree-1.0L-tactical

Luckily downloaded and opened the PDF manual.

"The Katadyn BeFree™ does not remove viruses."

That's a terrible omission on their product page.

"This filter removes bacteria, cysts and sediment with its pore size of 0.1 micron (0.0001 mm)."