@tconz Is your rose water a concentrate? The one I bought in an Armenian store is this one (Amazon also sells it). It did not cross my mind to sterilize it as I only use a capful into a glass of water from my Life Straw pitcher.
https://www.amazon.com/Cortas-Rose-Water-1-Count/dp/B00V8TRZG4/ref=asc_df_B00V8TRZG4?tag=bngsmtphsnus-20&linkCode=df0&hvadid=80470624769049&hvnetw=s&hvqmt=e&hvbmt=be&hvdev=c&hvlocint=&hvlocphy=&hvtargid=pla-4584070153338028&th=1