Advertisements for magazines
Advertisements for newspapers
For e.g. toilet walls, bus stations, train stations it will depend on what your charity is
Beer mats
Coasters
Stickers
Calendars
Posters
Poster for a do / event / concert / fundraiser e.g. walk / bungee jump / parachute jump etc.
Leaflet
Letterbox campaign
Bus advert
Pen
Key ring
T shirt