Yes, just stand alone, no product in it. The reason I never noticed it was made by Nalgene was because I got it in a supermarket not any sort of specialty store so didn't expect it to be a good brand name.
As a luxury last year I took with me some powdered dessert which when mixed with milk and shaken sets without refrigeration and taste wonderful. So to have a screww on lid for the shaking part was great. Otherwise it was my coffee cup.
JAM ! Why not ! I firmly believe that one of the reasons/rewards of going light is to be able to carry some luxuries. If your packs is no burden because it's so light, why not pack a delicious blob of jam !