The medieval way to carry bulky goods was in barrels. Barrels today look essentially like their old-fashioned counterparts, and are often available used for little or no cost. This is a barrel that we use to carry our tent in. While we're in camp, it serves as a dirty clothes hamper.
I bought this small cask on eBay that I plan to use for wine. It doesn't have to be watertight, or even sterile, because I'm going to buy wine-in-a-box, remove the box, and slip the bag of wine into the barrel so that it's spigot sticks out the barrel's tap hole.
For drinking water, we hope to get one of these kegs from Jas. Townsend and Son, a supplier to 18th Century re-enactors.