You're right Stan, they are training ampoules, saline filled in case you accidentally break the skin with them but I doubt they are sterile anymore as there seems to have been some evaporation. More for training the casualty and medic on actually poking the victim. My guess is that they were issued fresh for training a long time ago, and instead of poking each other they were secreted away while appropriately nodding and grimacing to the Warrant officer or LT doing the training. Never went back to get them out.