Portable Toilets You Can Keep in Your Car

Anyone who has been stuck in highway gridlock with a toddler, a pregnant passenger, or an older parent knows why people keep a toilet in the trunk. A portable toilet for the car is a small, self-contained seat or bucket that stores in the cargo area, comes out when needed, and packs back up afterward. It is a daily-readiness item more than a comfort item, so the key traits are small stored size, stability, and a way to contain waste.

The five options below range from bucket-style seats to compact folding frames and a small cassette-style model. Descriptions follow only what the names state, so please verify dimensions on the listing. Read the buying rules, check the table, and keep an eye on the “skip it if” line under each product, because the wrong format can be more trouble than it is worth.

Quick Picks

The five picks cover four formats: a rigid bucket, a padded-seat bucket, a folding frame, and a bag-based kit, plus one compact flush model. Most drivers only ever need one of these, so the useful question is which format you will actually unpack and use when the moment comes.

How to Choose

Measure the space you can spare

Cargo space is the constraint that eliminates more products than any other, so deal with it first and save the feature comparison for later. Before comparing models, measure the cargo area or the space under a seat. A bucket-style toilet needs roughly the footprint of a 5-gallon bucket, about 12 inches across and 15 inches tall, while collapsible frames can shrink to a flat panel a few inches thick. A good rule of thumb is to choose the smallest stored size that still holds a seat you will actually use.

Choose a waste-handling method you will tolerate

What happens after use is the part buyers skip over in the shop and regret on the road, so picture the full cycle from seat to trash before you choose. Most car toilets use disposable bags with absorbent gel, a bucket with a liner, or a small holding tank with a flush. Bags are the lightest and cleanest to dispose of, while a flush tank is more comfortable but needs rinsing and a proper dump location. Think honestly about whether you will be able to empty and clean the unit, because that is where most buyers give up.

Check the stability and weight rating

Safety on an improvised toilet is mostly about the base and the weight limit, which are easy to check before buying and hard to fix afterward. A seat that wobbles is unsafe and unpleasant. Look for a stated weight rating of at least 250 pounds, a wide, non-slip base, and a lid that locks or holds shut during travel. Seat heights around 14 to 17 inches suit most adults, and shorter seats are easier for children.

Plan privacy and odor control

Comfort is as much psychological as physical, and a toilet nobody is willing to use is wasted cargo space. A car toilet is only useful if you can use it without embarrassment. Pair it with a privacy shelter, a poncho-style cover, or a vehicle with tinted windows. Sealable bags, closed lids, and a small container of absorbent powder help control odors until you reach a trash receptacle.

Our Picks Reviewed

Dimensions, weight ratings, and tank sizes are not stated in these product names, so the notes below stay at the level of format and design. Look up the listed measurements before ordering, especially the packed size, since that is what decides whether it fits in your vehicle.

Reliance Luggable Loo

Parents on school-run duty and commuters stuck on closed highways share the same worry, which is having no good option when a restroom is hours away. A bucket-style unit is the most direct answer. The Reliance Luggable Loo takes its name from the idea that you can lug it around, and it is a long-time reference point for bucket-style portable toilets. It is the plainest, most direct approach to a trunk toilet.

• Pro: A bucket-and-seat design is simple, with very few parts to break or lose.
• Pro: Bucket-style toilets work with liner bags, making emergency use easy to understand.
• Con: A rigid bucket does not shrink, so it takes steady cargo space even when unused.

Skip it if your trunk is already full or you need a flush-style toilet with a water tank.

Reliance Hassock Portable Toilet

Older passengers and anyone with stiff knees tend to care most about how the seat feels and how easy it is to stand up again afterward, which makes seat design a real factor. The Reliance Hassock Portable Toilet uses a word for a padded seat or footstool, which hints at a seat-focused design. It keeps the family resemblance to the Luggable Loo while changing how the seat looks and feels.

• Pro: A seat with a cushion-like feel can make improvised use more comfortable for older passengers.
• Pro: A familiar brand makes liners and accessories easy to source.
• Con: A padded seat design may be bulkier than the plainest bucket-style units.

Skip it if you need the smallest stored size or are packing a small hatchback.

Reliance Fold-to-Go Collapsible Portable Toilet

Hatchback and sedan owners usually have the least spare trunk volume, so a design that disappears when not in use solves the biggest barrier to carrying one at all. The Reliance Fold-to-Go Collapsible Portable Toilet says in its name that it folds. Collapsible frames are the format of choice when trunk space is tight and you only need the toilet on rare occasions.

• Pro: A collapsible design stores flat, so it can live behind a seat or in a side compartment.
• Pro: A frame that folds usually pairs with disposable liners, which keeps clean-up simple.
• Con: Folding frames are often less sturdy than rigid buckets, so weight capacity and stability need attention.

Skip it if the toilet will be used often by heavier adults or if you prefer a rigid seat with a lid.

Cleanwaste GO Anywhere Portable Toilet

People who dislike rinsing or carrying waste around often prefer a system where the clean-up is handled by a sealed bag that goes straight into the trash at the next stop. The Cleanwaste GO Anywhere Portable Toilet comes from a brand known for portable waste solutions, and the “GO Anywhere” label emphasizes flexibility. It is aimed at people who prefer a bag-based system.

• Pro: A specialist waste brand tends to build around bag systems that handle disposal as part of the design.
• Pro: Bag-based setups avoid carrying water or rinsing a tank.
• Con: You must carry spare bags and have a place to throw them away.

Skip it if you want a flush experience or are unable to manage used bags.

Thetford Porta Potti 135

Owners of vans, wagons, and large SUVs who expect to use a toilet repeatedly rather than once in a blue moon may be willing to trade a little cargo space for a more comfortable, flush-style design. The Thetford Porta Potti 135 is a smaller numbered model in the Porta Potti line. That line is built around a flush-style system with separate water and waste tanks, which is a step up in comfort.

• Pro: A compact flush-style toilet feels closer to a standard toilet than a bucket does.
• Pro: A numbered small model suggests a size aimed at limited spaces such as vans and cars.
• Con: A tank-based toilet needs rinsing, a dump point, and some regular maintenance.

Skip it if you want a throw-in-the-trunk emergency kit with zero upkeep.

Which One Fits

Start with how often the toilet will leave the trunk. If the answer is almost never, favor the cheapest-to-store option and accept some discomfort. If it will be used on regular commutes or family outings, a sturdier seat or a flush-style unit is a better long-term fit.

• Plain emergency readiness: Reliance Luggable Loo.
• Seat comfort for older riders: Reliance Hassock Portable Toilet.
• Tight cargo areas: Reliance Fold-to-Go Collapsible Portable Toilet.
• Bag-based clean-up: Cleanwaste GO Anywhere Portable Toilet.
• Regular van-style use: Thetford Porta Potti 135. For road trips that include long highway stretches, also look at the toilets for car travel guide.

Practice a dry run in the driveway before the first real need. Setting up, lining, and packing away the toilet once at home reveals missing liners, awkward latches, and size problems while there is still time to fix them.

Common Mistakes

1. Buying a rigid bucket for a trunk that cannot spare the space.
2. Forgetting spare liners and absorbent packets.
3. Ignoring the weight rating and stability of folding frames.
4. Not planning where to dispose of waste.
5. Skipping a privacy plan and ending up unable to use the toilet.

FAQ

Is it legal to use a portable toilet in a parked car?

Rules vary by location. Use it on private property or at designated rest areas and always dispose of waste properly. Public lands often have specific waste-carry-out rules, and some municipalities treat roadside dumping as a fine-worthy offense, so check local regulations before relying on any improvised setup.

How do I dispose of waste bags?

Sealed bags usually go into household trash, but regulations differ. Never dump waste in storm drains or natural areas.

Can I use it for children?

Yes, with supervision. A lower seat or a child insert makes the experience safer.

What about RV-style models?

Larger flush models are better suited to campers. See the portable RV toilet guide for that format.

Is a car toilet still useful as of 2026?

Yes, especially on long drives. Pair it with a portable CD player for the car if you are building a full road-trip comfort kit.