Here in the Netherlands, all units are metric (g, ml, g, kg). Liquid products are advertised by volume, but is they're watery (ie. most products), you can just

Here in the Netherlands, all units are metric (g, ml, g, kg). Liquid products are advertised by volume, but is they're watery (ie. most products), you can just assume litres are kilograms. Fatty or very sugary liquid products (e.g. cream, syrup) are the only things that can't easily be compared to kg price. I've only seen those advertised by volume, so they can still be compared to their peers.