Portable, rapid-testing units grease wheels in Calgary curling bubble The men curling in the Canadian championship don't much care there's a small, silver box processing their nasal and throat swabs in a matter of hours, but the result it produces matters deeply to them. The Canadian Press VIDEO SIGN OUT CALGARY — The men curling in the Canadian championship don't much care there's a small, silver box processing their nasal and throat swabs in a matter of hours, but the result it produces matters deeply to them. A portable rapid-test unit the size of a tissue box not only greased the wheels for the curling bubble in Calgary, but it's also used in other sports across Canada to test for the COVID-19 virus.