https://www.statista.com/statistics/505794/cds-per-capita-co...
So, 1 can per every other day is 1/4 the average consumption. It would be strange to call such a consumption level highly unhealthy.
This has two dimensions:
First, I would consider something extremely unhealthy which leads to a reduction of life expectancy which is similar to other extremely unhealthy consumption such as with the opiod epidemic. I haven't of any study which would suggest that a can of soda or juice every other day would inflict a strongly negative health outcome (at least if counter-balanced by other healthy behaviors).
Second, it is strange to use extreme terms for behavior which is already endemic and normal in a population. You would want to use terms such as highly and extreme for instance for those who consume half a gallon or a gallon of soda per day.