Haven’t tried those tabs for many years but I recall them tasting terrible. Good for emergencies perhaps.

Filtration systems are available but cost several thousand dollars and require core replacements every two years for around $300-400.

On the other hand, a gallon of potable water from one of the few springs in Bali costs around $3.

The NaDCC tablets leave no taste.

Water purification tabs, straws, and bottles are not practical unless you are in an extreme environment to find clean water (hikes, for example).

- They tested awful. Iodine tablets have an awful taste after. We often use orange flavored powder to hide it.

- They are expensive in third world countries. You have to use one tablet per liter, and it costs about 10 cents USD per tablet. In comparison, you can buy a 1L plastic bottle of water for 30 cents.

- it takes about half an hour to work, so you can't use them immediately.

- Even if you buy those straws, they have a maximum lifetime before you have to replace the filter (about 1000l). You will need to replace about twice a year if you were to use as the daily drive.

I couldn’t tell any taste with the NaDCC based chlorinating tablets. They’re not household bleach.

Iodine is old tech, and has other issues.

10cents < 30cents. And don’t underestimate the logistics of transporting bottled water.