WATERBRICKS ARE NOT INTENDED FOR THE STORAGE OF ANY FLAMMABLE LIQUIDS.
Stacking: Although WaterBricks, when filled with content, are designed to be cross stacked up to 5 feet in height for storage purposes, we strongly recommend that the average person not exceed 4 feet in stacking height or beyond one’s own ability to handle safely. Please Note: WaterBrick may not be an approved building product in your area. Please check with your local building code authorities before proceeding.
High Density Polyethylene: WaterBrick containers are made from High Density Polyethylene (HDPE) plastic. Most milk jugs, detergent bottles, juice bottles, butter tubs, and toiletry bottles are made from HDPE. According to Trusted MD, “To be certain that you are choosing a bottle that does not leach, check the recycling symbol on your bottle. If it is a #2 HDPE (high density polyethylene), or a #4 (low density polyethylene), or a #5 PP (polypropylene), your bottle is fine. The type of plastic bottle in which water is usually sold is usually a #1, and it is only recommended for one time use. Do not refill it. Better to use a reusable water bottle, and fill it with your own filtered water from home and keep these single-use bottles out of the landfill.”