Pen - Blue: where to find it

RoomContainers
Any roomBox
Any roomBox
Any roomCorpse
Any roomCorpse
Any roomCupboard
Any roomDrawer
Any roomDrawer
Any roomother
Any roomOutfit_Foreman
Any roomOutfit_HonorStudent
Any roomOutfit_OfficeWorker
Any roomOutfit_OfficeWorkerSkirt
Any roomOutfit_Teacher
Any roomOutfit_Trader
Any roomOutfit_Waiter_Classy
Any roomShelves
Army storageCupboard
Art Storeother
Art StoreShelves
AtticBox
AtticCrate
Atticother
Bag Trash Bagjunk
BedroomBox
BedroomCrate
BedroomDrawer
BookstoreCupboard
Break roomother
Burger diningCupboard
Car dealership officeother
ChangeroomLocker
Classroomschooldesk
ClosetLocker
Closetother
Comic storageLocker
Control roomCupboard
Crepe diningCupboard
DaycareCupboard
DaycareDesk
DaycareShelves
DaycareShelves
DiningCupboard
Drug shackOven
Elementary classroomschooldesk
Garage storageCrate
Garage storageother
General StoreShelves
GigaMartShelves
Hallother
Kids bedroomCupboard
Kids bedroomDrawer
Kids bedroomShelves
KitchenCupboard
Kitchenother
KitchenShelves
Living roomCabinet
Living roomCupboard
Living roomCupboard
Living roomDrawer
Living roomDrawer
Living roomLocker
Living roomother
LobbyCupboard
MechanicShelves
Medical officeShelves
Movie Rental OutletLocker
Officeother
OfficeShelves
OfficeShelves
Office storageother
Office storageShelves
Office storageShelves
Plaza storeother
Police officeShelves
Post OfficeCupboard
Post OfficeDesk
Post storageCupboard
Recreationother
RecreationShelves
Restaurant diningCupboard
Secondary classroomschooldesk
Storage Unitother
Survivor Cache Big BuildingCupboard
BinJunk
ClosetJunk
CounterJunk
DeskJunk
HandbagsAndPurses
Pencil Case
Schoolbag
ShelfJunk
SideTableJunk