Our Sterile Water source is Baxter "Sterile Water for Irrigation, USP", which we've also found to be RNAse and DNAse free. 1 liter bottles of it are in the cabinets on the left in J330, above the -80C Chest Freezer. Take a 1 liter bottle, label it with the date opened, and aliquot 10-15 ml into a 15ml Conical tube for day-to-day use, labeling it with the date first used also. If the supply in J330 is low, let Soumya know.