filter4dIt’s hard to beat the price of this filtered water bottle, available in 20-, 24- and 32-ounce sizes, all priced under $20.Although we haven't tested this bottle, our pros appreciateフェノールレッド liquid, 0.5%, sterile-filtered, BioReagent, suitable for cell culture; CAS Number: 143-74-8; Synonyms: Phenolsulfonphthalein solution at Sma-Aldrich