Water delivery is not reserved anymore only to office customer. We can find different provider of Water in Hong Kong that deliver directly to your home.It is more convenient and also cheaper if you take advantage of their package.
They offer different plan. However the basic procedure is:
- you buy a set of coupon at a discounted price via phone or internet.
- you call the water provider call center to ask for a delivery
- the next day the delivery guy will bring the bottle (or few bottles) to your place in exchange of one prepaid coupon (of few coupons).
Here are the different provider in Hong Kong:
Watson Water
http://www.watsons-water.com
- Deliver to home or office (even for small quantity)
- Distilled or Mineral Water
- Different size of bottle from 4.5l up to 20l
- Sell/Provide water-dispenser

Bonaqua
http://www.bonaqua.com.hk
- Deliver to home or office (even for small quantity)
- Only mineral water
- Different size of bottle from 4.8l up to 5 gallon
- Sell/Provide water-dispenser

Jackel Porter
http://www.jackelporter.com
- Deliver to home or office (even for small quantity)
- Only distilled Water
- Different size of bottle
- Sell/Provide water-dispenser

Natural Spring
http://www.naturalsprings.hk
- Deliver to home or office (even for small quantity)
- Only mineral water
- Only one size of bottle
- Sell/Provide water-dispenser

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I would add that Bonaqua has a child safe hot water tap on the hot/cold dispenser while Watsons does not. We now use a second hand Bonaqua dispenser with Watsons bottles to get around the issue.
Or just drink tap water, which is perfectly safe, much cheaper and damages the planet to a far lesser degree.
Just an idea.
I agree with you, its is better to drink tap water to avoid those damages with plastic bottle on the planet. However it could be convenient for people living in old building. Those building have old water pipe which are never clean. So you end up with a water full of bacteria.