Nothing is a bigger tell-tale sign of an indoor smoking session than the lingering aroma of cannabis smoke. Whether you live in a weed-legal neighborhood or not, being discreet and respectful only serves you in the long run.
The simplest thing to do is to blow smoke out the window, but that doesn't prevent it from traveling back inside, or eliminate the inconvenience of sticking your whole head out a window. Thankfully, a handy device exists that minimizes cannabis odor and keeps things stink-free. It's called a sploof.

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A sploof is a cylindrical object that filters cannabis smoke through a set of perforated materials. The device uses a filtering material, such as a dryer sheet, to remove smoke and odor particles from smoke blown into it.
The cannabis world offers up several professional-grade varieties of the original sploof, such as the Smokebuddy. However, these can run upwards of $50 and require frequent replacement of the activated carbon filter.
Never fear, you can create a sploof out of a few objects you most likely have lying around the house. With a little effort, you can consume your cannabis and significantly reduce the levels of rogue terpenes in the air. Read on to learn how to make a proper homemade sploof.
Supplies to make a sploof
You can create a sploof using a variety of materials. It all depends on your budget, your particular filtering needs, and the desired longevity of your sploof.
All sploofs function using the same principles: a closed-off tube with holes on both sides filled with filtering material. The filtering material is key, as this is what traps the canna-stink. Many DIY sploof-makers build their sploofs using dryer sheets, while others who want a longer-lasting filter opt for activated charcoal.

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You also have multiple options for the tube itself. A plastic bottle serves as a sturdier, longer-lasting sploof frame, while others opt for a cardboard toilet paper roll in a pinch. Despite the variety of materials, you'll need the following elements to create your sploof:
- Cardboard toilet paper roll or plastic bottle, regardless of size
- Scissors or a knife
- A rubber band, string, or some tape
- Scented dryer sheets or activated charcoal
How to make a sploof
Once you've assembled your materials of choice, it's time to build your sploof. If you're using a plastic bottle, use the scissors to cut off the top half of the bottle and discard the bottom half. If you're using a toilet roll, no need to make any modifications.
Next, take your scented dryer sheets and pack them into the tube. There's no need to densely pack in the sheets, as around three-to-five should adequately mask the cannabis scent.
Once your sploof is full of dryer sheets, wrap a final dryer sheet over one end of the toilet paper roll or the wide end of the bottle. (This allows you to use the bottle opening as an aesthetic, functional opening into which you'll blow weed smoke.) Fasten the dryer sheet to the tube using string, tape, or an elastic band. Voila! Your sploof is now ready to filter your stinky cannabis smoke and make the air in your room much more breathable.

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If you're using activated charcoal, the process varies slightly. You can easily pick up activated charcoal at pet stores, as it's commonly used to absorb unwanted materials in fish tanks.
First, rinse the charcoal in water to activate it and remove dust. Poke some small holes in the bottom of a plastic bottle, enough to ensure smooth airflow. To keep charcoal from leaking out through these holes, tape a layer of paper towel around the base of the bottle. Finally, fill the bottle with charcoal, and your sploof is ready to use.