Ampoules (5)
I believe the answer is:
vials
'ampoules' is the definition.
('vial' can be a synonym of 'ampoule')
This is all the clue.
(Other definitions for vials that I've seen before include "Small bottle that contains a drug" , "Vessels" , "Small bottles of medicine" , "Small glass containers" , "Ampoules" .)