Packaging

ship fire extinguishers with any major carrier
Can I Ship Fire Extinguishers With USPS?
It is indeed legal to ship fire extinguishers with the US Postal Service, and you can use any of their air-based or surface transporation services to do so.
ship cookies and baked goods
The Cheapest Way to Ship Cookies and Baked Goods
The cheapest way to ship cookies & baked goods is USPS First Class Package Service for packages under 1 lb, and Priority Mail Cubic for packages over 1 lb.
Ship meat with USPS
How to Ship Meat and Perishables with USPS
The best way to ship meat and perishables with USPS is to ship them Priority Mail Express, and to make sure you include sufficient cooling packing material.
ship liquids and beverages with USPS to save the most money
The Cheapest Way to Ship Liquids and Beverages
The cheapest way to ship liquids or beverages is to use shipping software that gives you access to discounted USPS mail classes such as Priority Mail Cubic.
ship model rockets and ship toy propellants
Can I Ship Model Rockets and Toy Propellants with USPS?
You can ship model rockets and toy propellants with USPS, but you can only use ground transport services such as Parcel Select Ground and/or Retail Ground.
USPS Priority Mail Flat Rate
USPS Priority Mail Flat Rate: What You Need to Know
USPS Priority Mail Flat Rate is a sub-service of Priority Mail, where shippers pay "flat" fees to ship items in specific boxes or envelopes up to 70 pounds.
Ship fresh fish and ship seafood
How to Ship Fresh Fish and Seafood
When shipping fresh fish and other seafood, the most important things to consider are the speed of the shipping service, and how to package them properly.
Box in a Bag
Box in a Bag Shipping: What You Need to Know
A trick to saving even more money when shipping Priority Mail Cubic is to put your "box in a bag" and ship it that way. Here's everything you need to know.
ship perfume and other liquid fragrances with USPS
How to Ship Perfume, Cologne, and Liquid Fragrances
If you're looking to ship perfume or other liquid fragrances, the US Postal Service will give you the best mix of affordable rates and quick delivery times.
ship a canvas or painting
How to Ship a Canvas or Painting
The US Postal Service will offer you the cheapest option to ship a canvas or painting, but you'll want to protect your package with shipping insurance.
ship eyeglasses and eyewear
How to Ship Eyeglasses and Eyewear
Since they are lightweight items, the cheapest and quickest way to ship eyeglasses is USPS First Class Package Service...but don't forget to add insurance!
ship pillows, ship bed sheets, ship linens
How to Ship Pillows, Bed Sheets, or Linens
If you want to ship bed sheets, pillows, or linens, you'll need to be prepared to pay extra dimensional weight charges, no matter which carrier you choose.