The bottle version of Alpha Pharma's boldenone: the same 250 mg/ml oil solution, but held in a single 10 ml vial rather than split across ampoules.
The practical difference is access. A vial is entered repeatedly through a rubber septum, so one container serves many draws; an ampoule is snapped open and used. The trade-off is that the vial stays in circulation and depends on the stopper staying clean.
Chemically nothing changes — boldenone undecylenate is a long-estered injectable androgen, a close structural relative of testosterone with a comparatively mild oestrogenic profile.
