Where to put shopping lists?

I have recently moved from paper GTD to Nozbe and I love it! Also use the app for Iphone. Anyway, where do you put the different shopping lists?
Eg Groceries, pharmacy. It is not a project, but mostly an ongoing list with things going on the list and off the list. I have a sigle action projectlist, but I can only attache a note to the overall project, not to a single action. Anyone a great tip?