well its near winter and i need to replenish my fav South Australian wines

Bustardo and Tawny Port, here's the problem i buy in 2ltr glass flagons

but this year i am going travelling and glass being round and fragile is out

They do not make same in cask, so somehow i need to decant into what?

I have thought empty 2ltr milk containers, it only needs to keep for 3 mths at most

Other than transporting within the gut, what would be your recommendations,

needs to be square, thick walled container of 2 liter variety.......