Non-Members are penguins that do not pay for a membership, or who are former members who had a membership that has expired on Club Penguin. They have limited access to the game and its features.
What Non-Members Can Do
Buy and wear colors, flags, and backgrounds from catalogs, and most recently are able to buy items from a page in the Penguin Style catalog (introduced in January 2013).
There are several catalogs with items that non-members can buy as well.
Non-members can obtain several different igloos, either by unlocking them or obtaining them for free at parties.
Penguins can still keep their puffles, member-only stamps and pins when their membership have expired. However, they cannot have access to the members-only clothing, igloo and member-only furniture, their decorated stamp book cover, etc.
When a membership expires and the penguin is wearing member clothing, it stays on their penguin until they take it off.
Prior to February 2010, flags could only be purchased by members.
As of January 2013, non-members can buy clothing in Penguin Style.