Keep those bottles clean!
While not every bottle needs to be washed if you plan to refill it, having the proper tools for the job when you need it is crucial.
Long enough to clean even our 750ml bottles (same as a wine bottle - which are wonderful to reuse for olive oil once clean)!
If you are washing a bottle to refill with olive oil, do not re-cork your bottle after washing. Be sure it is 100% (we said: ONE HUNDRED PERCENT!!) bone dry before filling again.
I haven't had a chance to use this yet, but it looks like it will work great in cleaning the narrow-necked bottles.