Eminence Labs supplies trenbolone acetate in sealed single-use glass ampoules, ten to the box, each holding 1 ml of oil solution at 100 mg/ml.
Acetate is the shortest of the common trenbolone esters, releasing the hormone across a couple of days rather than a couple of weeks, which puts anything built on it at the fast end of the injectable category. The ampoule format follows that logic: one is opened, drawn and discarded, and no rubber stopper is punctured repeatedly over the life of the box.