Originally Posted by
cslovacek
We have a ‘special’ suitcase that will hold 12 bottles of wine. We have used it to bring back a full load from Napa and South Africa. Fully loaded, it will weigh about 48-49 lbs.

I've also used that type of suitcase (VinSafe Valise) and, fully loaded with 12 bottles it comes to 22.5 kg. However, be careful if you want to bring champagne back as the bottles are heavier.