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premium bottled water
Seems you can get Voss in Antwerp:
https://www.vosswater.com/index.php/voss-world/distributors/
Thankfully there are not so many poncy people in Belgium who need "premium bottled water"
the shelves of Perrier, Spa and other bottled waters would argue that there are plenty of "poncy" people who drink bottled water (you can decide what is/isnt "premium").
To the OP I'd suggest trying some of the european bottled waters and find one you like.