I seriously doubt it would be cheaper. For example to the UK you can bring in 110 litres of beer via plane. I doubt that your bags would be big enough. Consider going by boat (may not be easy to get to brugges)?
Shipping costs from the kettle rule of thumb: Living inside netherlands €1 per kg. So for outside the netherlands expect to pay approx 50 cent to €1 per 330 ml bottle.