Upcycled Mailer Box Projects to Spark Your Creativity

Make the most of unused mailer boxes. Learn how in this post.

Remember the pure joy of childhood? Transforming a simple cardboard box into a spaceship, a pirate ship, or a magical castle? That spark of creativity doesn't have to fade with age! 

This post reignites the magic of upcycling, showing you how to turn those forgotten mailer boxes from your doorstep into vibrant, functional masterpieces.

The Problem with Packaging Waste

Our love for online shopping has created a hidden monster — a tidal wave of packaging waste threatening to engulf our planet.

Here's the sobering truth:

We discard tons of cardboard boxes annually. These often end up in landfills where they take some time to decompose. The sheer volume of waste puts a strain on recycling facilities, creating a complex environmental puzzle.

This isn't just about a few boxes here and there. It's about the cumulative impact of our choices. As responsible consumers, we have a role to play in turning the tide.

But with careful upcycling and responsible disposal, we can be part of the solution. All it takes is a little creativity and a willingness to rethink how we handle leftover cardboard boxes.

The Power of Upcycling

Upcycling is a powerful tool that goes beyond being a fun activity. It's a conduit and catalyst for a more sustainable future.

Here's why:

Upcycling breathes new life into old objects, diverting them from landfills and reducing the need to buy and use new materials. It's also practically free. You're giving something you already have a new purpose. That means you're saving money you might have spent on buying brand new storage containers, planters, or even toys.


This practice leads to one-of-a-kind creations. You get to unleash your creativity and personalize your projects. Forget mass-produced; upcycled is where it's at!

And when you show off your creative upcycled masterpieces, you inspire others to do the same. It becomes a movement, a ripple effect of environmental consciousness.

So the next time you're about to toss that cardboard box, take a moment to consider its potential. With a bit of imagination and the ideas in this blog post, you can transform it from mundane packaging into a masterpiece of functionality and style. 

What Can You Make With Used Mailer Boxes?

As it turns out, you can make a lot of things with used mailer boxes. Below are just a few suggestions.

But before you get started with your project, make sure you sanitize your mailer boxes first.


We've all been there — staring at a room overflowing with stuff, overwhelmed by the clutter. But that's where the humble mailer box steps in. Let it unleash the inner organizer in you.


Do your kiddos own a lot of toys? Convert your mailer boxes into designated storage. Label them with pictures or words for easy identification.

You can also use these boxes to sort your seasonal wardrobe. Decorate sturdy mailer boxes to create unique storage containers for scarves or jewelry. Stack them neatly on shelves or closets for a visually appealing, space-saving solution.

Utilize mailer boxes of various sizes to organize office supplies like pens, paper clips, and notepads. For extra functionality, cut cardboard dividers to create compartments within the boxes, keeping everything perfectly categorized.

Repurpose mailer boxes to organize craft supplies. Use separate boxes for paints, brushes, yarn, or any other materials you use. 


Mailer boxes can be transformed into eco-friendly garden heroes too! Cardboard is a natural weed suppressant. Flatten those mailer boxes and lay them directly on your garden bed, overlapping slightly to create a weed-blocking barrier. 

You can top it all off with a layer of mulch (like wood chips or straw) for a polished look and added nutrients as the cardboard decomposes. However, some recommend not doing so, as that will break down the cardboard before it can get rid of weeds.

Here's another option:

Give your seedlings a healthy start with a mailer box! Cut out the bottom of a small box and poke drainage holes. Fill it with potting mix and voila! You have an eco-friendly starter pot for your seedlings to thrive before their big move to the garden.


Tearing mailer boxes into squares and using them as mulch isn't out of the question. This helps retain moisture in the soil, keeping your plants happy and hydrated while suppressing those pesky weeds.

Bonus tip — Cardboard can be a valuable addition to your compost pile! Shred it into small pieces for faster decomposition.

By giving your mailer boxes a second life in the garden, you're not only reducing waste but also creating a more sustainable and flourishing green haven. So, the next time you receive a package, look beyond the cardboard and see the potential for a thriving garden companion!


This section is all about turning those leftover mailer boxes into incredible creations that spark joy for all ages.


Large mailer boxes are the perfect building blocks for imaginative play. Transform them into a playhouse or fort — complete with windows, doors, and even decorative details. Let your kids unleash their inner architects and create a cardboard masterpiece.

You can also use boxes to bring your stories to life. Cut out shapes and decorate small mailer boxes to create a cast of fun and unique puppet characters. Write a simple script, create some puppets, and host your own delightful puppet show.

Cardboard scraps from mailer boxes are a treasure trove for crafters of all ages. Create coasters with colorful paint. Design bookmarks with vibrant markers or glitter glue. Feeling more ambitious? 

Cardboard can be the base for stunning wall hangings or decorative sculptures. Its versatility extends beyond basic crafts. Use it as a stencil for drawing or painting projects. Cut out shapes for a fun game of cardboard bingo or create a cardboard maze for small toys to navigate.


There are so many pet projects you could start using discarded mailer boxes. 


For starters, you can use them to create scratching posts for cats. Cats are naturally drawn to the texture of cardboard. Transform a small mailer box into a scratching post haven for your feline friend. Here are two options:

  • Vertical Scratcher — Cut the box into a standing rectangle and secure it to a sturdy base. Cover the sides with sisal rope or carpet scraps with strong glue. This provides a vertical scratching surface that'll keep your cat entertained for a long time.
  • Horizontal Scratcher — Flatten the box and cover the entire surface with sisal rope or carpet scraps. This creates a horizontal scratching pad that's perfect for cats who love to sprawl out while sharpening their claws.

Mailer boxes also make cozy hideaways for small pets like hamsters, guinea pigs, or rabbits. Line a box with soft fabric like fleece or cotton and cut a small entrance for easy access. You can even add a hay bed inside for extra comfort.

Alternatively, you can connect several small boxes together by cutting openings on the sides. This creates a fun tunnel system that your small pet can explore and burrow through.

For feathered friends, create a foraging toy from a cardboard box. Fill it with shredded paper, treats, or small toys and poke holes on all sides. This encourages your bird to explore and search for hidden goodies, keeping them mentally stimulated.

Another idea:

Create a cardboard chew toy by rolling up a flattened box and securing it with twine. You can even stuff the center with some newspaper or other safe paper for added chewing fun (just be sure to supervise your pet and replace the toy when it gets too worn down).


Upcycling isn't just about giving old objects a new life; it's about reducing waste, saving money, and unleashing your creativity.

Mailer boxes, in particular, are a treasure trove of upcycling potential.

So the next time you receive a package or have excess seasonal boxes, don't be so quick to toss the box. With a little ingenuity, you can turn it into something special.

Do you need mailer boxes for your business? We'd love to talk to you! Ask us how we can help you grow your brand through awesome packaging. Give us a call or send us an email at sales@packm.com

Related Posts

We use cookies to enhance site navigation, enable some functionality, for analytics, and support our marketing. Our functionality includes third-party technologies that may access and store your data within our secured accounts at their sites. Learn more in our Terms and Privacy policies. By clickingAcceptor continuing to use the website, you agree to our use of cookies and other technologies.