
There are many ways to make a litter box out of a plastic container. The first step is to find a suitable plastic container. It should be large enough for your cat to comfortably fit inside and deep enough for them to stand in without touching the lid. The next step is to cut an entrance hole for your cat. This can be done using various tools such as a utility knife, box cutter, jigsaw, rotary tool, or even kitchen shears. It's important to measure and draw lines before cutting to ensure the hole is the correct size and shape. Some cat owners also recommend making the entrance hole higher up on the container to prevent cats from kicking litter out or peeing outside the box. After cutting the hole, you may need to sand or file the edges to smooth them out. Finally, fill the box with litter, and you're done! This DIY method is a simple, cheap, and mess-free solution for cat owners.
| Characteristics | Values |
|---|---|
| Plastic container type | Lidded, hard-sided, transparent, high-sided, clear polypropylene, Sterilite, Rubbermaid, Sterlite |
| Tools | Utility knife, jigsaw, rotary tool, Sharpie, scissors, box cutter, Dremel tool, wood-burning tool, soldering iron, lever bar scraper tool, sandpaper |
| Cutting technique | Measure and draw lines, cut slowly along the lines, cut a pilot hole, cut in straight lines, cut from the centre out |
| Hole position | High off the ground, at the end of the box, on the side of the box |
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What You'll Learn

Choosing a suitable plastic container
The type of plastic used is also important. Some plastics are harder and more challenging to cut through, so ensure you have the appropriate tools. Transparent polypropylene boxes are a good option, but be aware that some find them more prone to cracking when cutting. Thinner, older types of plastic containers may be easier to cut through with scissors or a box cutter.
Look for containers with flat bottoms, as these are easier to clean. Ridges or inset corners can be difficult to keep tidy, especially if you plan to use liners. Consider a container with a lid, which can be useful if you want to fully enclose the litter box or need to store it away discreetly.
Finally, the shape of the container can be adapted to your cat's needs. If your cat tends to fling litter, a side entrance may be preferable, while a front entrance might be better for cats that stand up to pee, ensuring they don't relieve themselves outside the box.
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Cutting the plastic
First, you need to decide on the placement of the entrance. If your cat tends to fling litter, a side entrance set up higher than usual might be a good option. Mark the plastic with a permanent marker, outlining the shape and size of the entrance. You can use a magazine or a dinner plate as a template to draw the outline. Ensure the height is comfortable for your cat to enter and exit while containing the litter inside the box.
When you're satisfied with the outline, it's time to start cutting. You can use various tools for this step, depending on the type of plastic and your preference. Some common tools include a utility knife, box cutter, jigsaw, rotary tool, or even large scissors. If you're using a knife, ensure it has a fresh and sharp blade to reduce the risk of cracking the plastic. Go slowly and carefully cut along the marked lines. It may take multiple passes to cut through the plastic completely.
If you're having trouble cutting through thicker or harder plastic, you can try melting the plastic. Use a wood-burning tool or a soldering iron to carefully melt along the marked lines. This method takes time and caution to avoid melting too much plastic or inhaling the fumes. Alternatively, you can make small pilot holes with a sharp object and then use scissors to cut along the marked lines, creating strips of plastic that can be removed.
Once you've cut out the entrance, it's important to smooth the edges to ensure your cat's safety. You can use sandpaper or a Dremel tool attachment to clean up the edges and create a smooth finish. Always wear safety glasses when cutting or sanding plastic to protect your eyes from debris.
Remember that you can always cut more, but you can't undo a cut, so take your time and make gradual adjustments as needed. With careful cutting and some creativity, you'll have a functional and customised litter box for your feline friend.
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Shaping the entrance
Planning the Entrance:
Before you start cutting, carefully plan the placement and size of the entrance. Consider your cat's habits and preferences. If your cat tends to fling litter, a slightly higher entrance will help contain the mess. For male cats that stand up to pee, a higher entrance will also prevent them from peeing outside the box. Mark the planned entrance with a permanent marker, ensuring it's not too low, as this can also cause litter to be kicked out.
Tools for Cutting:
You'll need a tool to cut through the plastic container. This could be a utility knife, a box cutter, a rotary tool like a Dremel, a jigsaw, or even large scissors. If you want to avoid cutting, you can try using a wood-burning tool or a soldering iron to melt through the plastic. If you go this route, be very careful and work slowly to avoid burning yourself or inhaling plastic fumes.
Cutting the Entrance:
Once you've marked the entrance, carefully cut along the lines with your chosen tool. Take your time and go slowly to ensure a straight cut. Remember, you can always cut more, but you can't undo a cut, so it's better to cut less than you think you need at first. If you're using a blade, you may need to make multiple passes to cut through the plastic completely.
Sanding and Smoothing:
After cutting, use sandpaper or a file to smooth out the edges and remove any sharp pieces of plastic. This step is important for both your safety and your cat's comfort. If you melted the edges, be sure to let the plastic cool completely before handling it, and then sand it down to create a smooth entrance.
Testing and Adjusting:
Once the entrance is cut and smoothed, test it with your cat to ensure they can enter and exit comfortably. If needed, you can always adjust the size or shape of the entrance. Remember that it's better to make gradual adjustments than to make a sudden, drastic change that your cat may not like.
By following these steps and taking your time, you can create a functional and mess-free entrance for your DIY litter box out of a plastic container.
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Smoothing the edges
First, determine the type of plastic your container is made of. This is crucial because different types of plastics require different smoothing techniques. The most common type of plastic used for containers is acrylic, which is versatile and damage-resistant.
If you are working with acrylic or a similar type of plastic, you can use a saw to cut the edges. However, not all saws are created equal. To achieve a smooth finish, opt for a saw with fine, closely spaced teeth. Blades designed specifically for cutting acrylic will give you the cleanest cut and reduce the amount of sanding required later. If you are using a hand saw, consider using a guide to ensure a straight cut. Alternatively, you can use power tools such as a table saw or a bench jointer to achieve precise, straight cuts.
Once you have made your cuts, it's time to smooth the edges. Start by sanding the edges with waterproof sandpaper in varying grits. Begin with a coarse grit, around 180, and gradually move to finer grits, such as 320/360, and finally, 600, which is considered super fine. Always remember to wet-sand acrylic to avoid accidents. If you desire an even smoother and shinier finish, you can explore flame-polishing. Carefully expose the edges to a gentle flame, such as a stovetop burner, to melt the plastic and create a high-gloss surface. However, always ensure proper ventilation when working with flames and be cautious not to overheat the plastic.
If you are working with a different type of plastic that does not respond well to sanding or flame-polishing, there are alternative methods. You can use a soldering iron to melt and smooth the edges, followed by sanding for an extra smooth finish. Another option is to use a deburring kit, which can round off the edges and create a smooth feel.
Remember, the key to achieving smooth edges is taking your time, using the appropriate tools, and adapting your technique to the type of plastic you are working with. With the right approach, you can create a safe, durable, and aesthetically pleasing litter box for your furry friend.
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Adding a litter tray
Next, you need to mark out the entrance on the plastic container. Using a permanent marker, draw the outline of the entrance. Some users recommend using a template, such as a magazine or a dinner plate, to get a smooth, rounded shape. If you're happy drawing freehand, you can skip this step.
Now it's time to cut out the entrance. You can use a variety of tools for this step, depending on the thickness and hardness of the plastic. Some recommended tools include:
- Utility knife
- Box cutter
- Jigsaw
- Rotary tool (e.g. Dremel)
- Scissors
- Kitchen shears
- Wood-burning tool
- Soldering iron
Take your time with this step to ensure a neat and precise cut. If you're using a blade, make sure it's sharp to prevent cracking. Go slowly and make multiple passes until you're confident to cut through the plastic. If you're using a wood-burning tool or soldering iron, be very careful as these tools get extremely hot.
Once you've cut out the entrance, you may want to smooth the edges to remove any rough spots. You can use sandpaper or a Dremel tool attachment for this.
Finally, add litter to the box and encourage your cat to try out their new litter tray!
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Frequently asked questions
You will need a plastic container, a cutting tool (such as a utility knife, box cutter, jigsaw, rotary tool, scissors, or wood-burning tool), a permanent marker, and sandpaper.
First, measure and mark where you want to cut the plastic container with the permanent marker. Then, carefully cut along the lines with your chosen cutting tool. You can use sandpaper to smooth out any rough edges.
You should consider the size of your cat and the depth of litter you plan to use. The plastic container should be large enough to accommodate your cat comfortably and deep enough to hold at least 6 inches of litter. Additionally, if your cat tends to fling litter, you may want to cut the entrance higher off the ground to minimize mess.











































