FLEXIBLE ADAPTER - Pump adapter will allow to pump to fit jugs with a diameter of 48mm to 55mm bottles. Compatiblele with 3 to 5 Gallon Water bottle with Crown-top or Screw-top WHAT'S IN THE BOX - Pump, Spout, Various Size Tubes (4 in tota for various bottle sizesl) and Manual - Only use with Drinking Water! MANUALLY OPERATED - Dispenses as quickly or slowly as you would like / No batteries, No electricity needed, Eco-Friendly Solution - No More disposable bottles BPA FREE TUBES - Dolphin Pumps Intakte tubes are made of BPA Free plastic. Enjoy drinking water without the fear of any contaminents in your fresh water! Yes, Dolphin Water Pump is made of premium quality polypropylene (PP) which is commonly used for reusable food containers, beverage tumbler, or baby bottles. PP products are BPA free and do not leach any hazardous chemicals. In order to maintain the highest quality, we regularly conduct Material Safety Data test through the largest and one of the most notable chemical company in Korea LG Chem.