How to Ship Water and Other Liquids with the USPS
If you’re thirsty for more knowledge about shipping liquids with USPS, you’ve come to the right place. Shipping liquids requires an understanding of USPS guidelines and restrictions, including which items USPS classifies as liquids. We’ll give you all the basics of shipping and packaging liquids as well as how Stamps.com helps you in the process.
What are liquids?
Before we get started, let’s define the type of products we’re referring to. Alcohol can’t be shipped with USPS, so we’re only referring to non-alcoholic liquids. Additionally, the following types of liquids can’t be shipped:
- Flammable liquids
- Hazardous liquids
- Liquids with an “obnoxious odor”
On the flip side, creams and pastes are considered liquids and can be shipped through USPS. You’ll just need to follow the same guidelines as the ones listed above. Liquids, creams, and pastes with push-down tops also need to be mailed using “strong and securely sealed outer packaging.” Push-down tops can potentially open in transit, leading to the damage of other shipments and USPS equipment, so extra precautions need to be taken.
International liquid shipping restrictions
If you plan to ship liquids internationally, there are a few restrictions to keep in mind. The following items can’t be shipped with USPS to international destinations:
- Nail polish
- Gasoline
- Aerosols
- Perfume containing alcohol
- Flammable or combustible paint*
*Note: Water-based or Latex-based paints can be shipped internationally, as long as they don’t contain hazardous materials.
Tips for shipping liquids
Regardless of size, USPS requires packages containing liquids to be labeled on the outer packaging and to include orientation labels to show how your package should be handled. For liquids over 4 ounces, you’ll need to triple-wrap your shipment.
To triple-package your shipment, place your product in a leak-proof container that covers the original packaging. Then, place the container in a box, like a Priority Mail Flat Rate® Box. It also doesn’t hurt to fill the gaps in-between with absorbent materials. If you’re shipping liquids in glass or breakable containers, it’s best to add extra cushioning materials within the gaps of the box and around your products.
Shipping liquids with Stamps.com
Your customers are eagerly waiting for their drinks, makeup, and other products. With branded shipment notification emails and branded tracking, they’ll receive up-to-date tracking information from a customized tracking page. Our recent study showed that 43% of customers want daily tracking updates, so an easily accessible tracking option will help your business stand out.
Stamps.com merchants can also order free USPS supplies, like the aforementioned Priority Mail Flat Rate® Boxes. These supplies can be shipped directly to your home or business for no additional cost and include supplies for both Priority Mail® and Priority Mail Express® service options. To order free USPS supplies*, simply log in to your Stamps.com account and click the Buy Supplies option on your dashboard.
*If using Stamps.com Software, click Online Store on the left side of your dashboard.
Mail and Ship Anything From Home, Office, or Your Phone.
Frequently Asked Questions
How do NetStamps work?
You can print NetStamps if you have a Stamps.com account with sufficient postage balance. After logging in to your account, simply select print on “NetStamps,” choose how many to print, select to print on a NetStamps sheet or roll, and click print!
How fast is Priority Mail Express International?
Delivery is made by the country's postal service in 3 - 5 business days, depending on the destination.
How do I calculate domestic postage costs?
Our rate advisor feature helps you calculate exact postage or shipping rate for anything you send. All you need is your item's weight and dimensions -- we do all the math for you and recommend cheapest, fastest, and best rates across all carriers.
How long does USPS Ground Advantage take to deliver?
USPS Ground Advantage delivery time is typically the slowest for domestic shipping services, taking two to five business days depending on the destination.
What are the delivery times for UPS Next Day Air?
UPS Next Day Air offers guaranteed delivery by 10:30 a.m., 12:00 p.m., or end of day on the next business day, depending on the destination and specific service selected. Deliveries are made Monday through Friday, with Saturday delivery available in select areas for an additional fee.
What are nonmachinable envelopes?
Nonmachinable envelopes might be non-rectangular, rigid, unevenly thick, or have non-paper closures, meaning they cannot be processed efficiently by USPS's automated sorting equipment, and require special handling, resulting in a surcharge in addition to the standard postage.
USPS Priority Mail vs. First-Class Mail: What is the speed comparison?
USPS Priority Mail generally delivers in 2-3 business days. First-Class Mail, while more economical, typically takes 1-5 business days for delivery.
UPS Worldwide Saver vs. UPS Worldwide Expedited: What is the speed comparison?
UPS Worldwide Saver is faster than UPS Worldwide Expedited, offering delivery by the end of the next business day to major business centers, compared to 2-5 business days for Worldwide Expedited. Worldwide Saver provides a more economical alternative to premium express services while maintaining quick delivery.
How long does UPS Ground take?
UPS Ground typically takes 1 to 5 business days for delivery with 90% of UPS® Ground packages being delivered in 3 days or less.
How fast is UPS Standard compared to UPS Ground Saver?
UPS Standard is generally faster than UPS Ground Saver, as it has a typical delivery window of 1-5 business days compared to Ground Saver's 2-7 business days.
