Two brands of alkaline water were introduced at the Sheng Siong supermarket chain last year.
$134m The amount consumers here spent on bottled water in 2015, nearly 24 per cent more than in 2010, according to data from research firm Euromonitor International 1,000 How many times cheaper tap water is, compared to bottled water, according to national water agency PUB In fact, as brands come up with new ways to make their products stand out, the question is: Do their marketing claims hold water?
Experts say there are differences in the sources and treatment process, but it is difficult to say if one type is better than another.
They are natural mineral water, packaged drinking water, mineralised drinking water, distilled water and spring water.
Despite some studies affirming the benefits, experts told The Straits Times that more conclusive results are necessary to support claims for alkaline water and oxygenated water.
When it comes to the taste of water, most people cannot tell the difference, The Guardian reported in 2011.
"So, while it’s good to have natural minerals, it is also important to check the contents," she added.
But Mr Goh’s children do drink tap water when they are out.
Experts say the level of chlorine in Singapore’s tap water is within acceptable limits.
In 2016, chlorine levels in all the waterworks ranged from 2.04 to 2.98mg per litre, well within the World Health Organisation’s limits of 5mg per litre.