Are the Stainless Steel Water Bottles insulated? June 14, 2022 20:12 Updated Follow Yes, our stainless steel bottles are double wall insulated. Related articles How long do the Stainless Steel Water Bottles keep water hot or cold for? How do I clean my AquaTru stainless Steel Water Bottle? Does AquaTru water need to be refrigerated to prevent filtered water from collecting mold and bacteria? How do I clean algae or mold found in the closed areas of the water dispenser on the clean water tank? How often do I need to change my filters?