Sold Out Quick view Nitrous Express Nitrous Express NX Hot Water Bottle Bath - 15935 Compare $637.99 Hot Water Bottle Baths are a quick, reliable and convenient way to maintain consistent pressure in your 10, 12, or 15lb nitrous bottles., The Nitrous Express Hot Water Bottle Bath is the best engineered and the highest quality water based bottle heater... Currently Out of stock. On order! Currently Out of stock. On order!