Strainers and sieves are filters. A filter is a filter. A reverse filter is still a filter. Direction doesn’t make a difference because direction is subjective.
Direction matters in what you keep. A filter you keep the water. A strainer/sieve you keep the contents. Direction does matter, that’s why the comic has to specify reserve filter. But it’s a poor choice of words because reverse means it’s a strainer/sieve.
Strainers and sieves are filters. A filter is a filter. A reverse filter is still a filter. Direction doesn’t make a difference because direction is subjective.
Direction matters in what you keep. A filter you keep the water. A strainer/sieve you keep the contents. Direction does matter, that’s why the comic has to specify reserve filter. But it’s a poor choice of words because reverse means it’s a strainer/sieve.