Mark high priority items to purchase

My suggestion is: Ability to mark items on a shopping list as "high priority", e.g. by adding an exclamation mark to them. That way everyone using the list will know what to make an extra detour to purchase and what's not nearly as important to get today.

When I shop, not all items are equally important for me to bring home. E.g. if the shop has run out of milk I will need to go to a different shop to buy this today. But if my preferred brand of detergent is sold out, I might wait a week to buy it. So I'd prioritize milk with an exclamation mark.