You can drink this distilled water. Many people drink distilled water. Your CPAP also needs distilled water. You can buy distilled water cheaper here. I have purchased this Great Value distilled water in Walmart. I am now selling it because I now have a home distiller so I make my own distilled water. In Walmart, the price of 4 Litres bottle = $1.87 + tax +CRF (container recycling fee) + bottle deposit (10 cents) = $2.04 A pack of 4 bottles in Walmart = $8.16 I am selling it for $1.50 each, A pack of 4 sealed bottles = $6 (You can recycle 4 bottles, and get $0.40 back). You must buy a pack of 4 bottles (four 4 L bottles) for $6. Several sealed packs available. This item is available for pick-up in Burnaby area, near Canada Way & Sprott Street). If you are serious to pick up, please reply with phone number