(Web page says out of stock, be back in stock late in May 2012)
I ran across this for drinking water storage. Not sure there is any real advantage to just filling the tub.
Would someone or several someones measure your bath tub, for me. Length, width, depth. Last time I measured the tub at my parents house, it was under 50 gallons.
Christopher A. Young Learn more about Jesus
It's a bit late now, but there is a product called a WaterBOB or similar which is a food grade plastic bag shaped to fit a standard bathtub that you can fill with some 80 gal or so of water and have it stay clean and drinkable. Comes with a siphon pump that fits the port on the bag for easy dispensing. Not very expensive