what were the food items packed by them? [thre men in a boat]

From the text:

George suggested meat and fruit pies, cold meat, tomatoes, fruit, and green stuff. For drink, we took some wonderful sticky concoction of Harris’s, which you mixed with water and called lemonade, plenty of tea, and a bottle of whisky, in case, as George said, we got upset.

But I’m glad we took the whisky.

We didn’t take beer or wine.