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How to Ship Water and Other Liquids with the USPS

March 13th, 2018

Maintaining a steady flow of shipments and mailings is a key component for any business.  If your business is water, or if you’re mailing a shipment of water as a one-time transaction, then it’s important to remain compliant with USPS guidelines.

The important thing to remember is that you are allowed to mail non-flammable, non-corrosive, non-explosive, non-odoriferous and non-hazardous liquids with the USPS. This includes shipments of water and other types of qualifying liquids. In addition, non-hazardous creams and pastes are considered by the USPS to be liquids and can also be mailed.

Packaging water

There are specific packaging guidelines to keep in mind. Protect your packages against breakage and leakage. Whether you’re sending mountain spring water, or water enhanced by magnesium and electrolytes, make sure that you seal the liquid inside a waterproof container.

Some people prefer to drink water from a glass bottle instead of a plastic one due to health, taste-related or environmental concerns. If you’re sending a glass bottle via the USPS, we recommend placing it within an inner container that is sealed and waterproof. Then, place your inner container within outer packaging with plenty of cushioning material.

What about liquids like paints? Yes, these can be mailed, but there is an important caveat: do not mail paint cans with friction-top closures without placing them first within strong outer packaging.

For all mailpieces containing liquids, make sure you also clearly indicate as such on the outside of the package. You can write “LIQUID” or “LIQUIDS” with a marker.

Learn more about USPS guidelines for shipping liquids.

Using Stamps.com to ship water 

If you need to quench your customers’ desire for tracking information, we recommend using the Stamps.com Shipping Label feature. Barcoded shipping labels printed via Stamps.com have built-in, free tracking. Under the “Packages” section of the Stamps.com software, you can select one of our “Shipping Label” options. You can easily print a trackable label on plain paper or on one of our self-adhesive labels, such as the 4 1/4″ x 6 3/4″ shipping labels.

Don’t dampen your customers’ expectations. You can also use our Shipment Notification feature to email tracking information to your recipients. You can also order free USPS packaging by logging into your software and clicking on “Online Store,” which appears beneath “Buy Supplies.”

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