10 Best Small Toilets 2026 in the United States

The Litter-Robot 4 Supply & Accessory Bundle by Whisker is a large automatic self-cleaning cat litter box designed to simplify pet care. It measures about 27 inches long, 24 inches wide, and nearly 30 inches tall, offering a roomy interior for cats. Made of plastic, it's sturdy yet lightweight enough to move if needed. Unlike traditional litter boxes, it does not have a bowl shape or flush type since it operates automatically by separating waste into a drawer below without using water, so water efficiency is not a factor here.

Installation is simple—you just set it on the floor and plug it in, making it easy for most homes. The included accessories like odor traps, liners, wipes, and carbon filters help control smell and keep the area clean. Due to its size, it might be too large for very small spaces. It is highly rated for convenience and odor control, though price and maintenance of replacement parts might be considerations for some pet owners.

This product suits cat owners seeking a hands-off, clean solution rather than a basic litter box, especially if there is sufficient room to accommodate its size.

The Litter-Robot 4 with Step & Fence by Whisker is a smart, self-cleaning litter box designed for cat owners who want a low-maintenance, compact waste solution. Its size (about 24 inches square and nearly 31 inches tall) makes it quite large compared to standard small toilets, so it requires enough floor space and cannot be pushed against walls. The spherical bowl shape and automated sifting system efficiently separate waste from clean litter, reducing the need for manual scooping. This makes it very convenient and hygienic, especially for multi-cat households (up to 4 cats).

The unit includes a step and fence that help reduce litter tracking, keeping the area cleaner. It also features odor-reducing carbon filters, which significantly cut down on unpleasant smells—an important factor for indoor use. The Litter-Robot connects to an app, allowing you to monitor waste levels and even track your cat's health, a modern feature not found in traditional litter boxes or small toilets.

The height is taller than typical toilets and it requires a proper setup space, as it can’t be installed like a fixed toilet. It also needs cats to weigh at least 3 pounds to use it comfortably. While it doesn’t match the size or installation style of a typical small toilet, it represents an excellent choice for those specifically seeking a smart, self-cleaning waste solution for cats that minimizes odor and mess.

The Neakasa M1 Plus is a large, self-cleaning cat litter box designed especially for homes with multiple cats or larger breeds. Measuring 22 inches long by 20 inches wide and 26 inches tall, its open-top design allows cats to feel more comfortable and gives easier access compared to covered boxes. It uses a 360° rotary infrared sensor system to accurately detect cats and support safe operation, reducing false triggers even when curious cats come close. This feature is great for busy households with active pets. The waste container holds up to 11.2 liters, allowing 7 to 14 days of maintenance-free use, which is ideal if you're away for a few days or prefer less cleaning. Its advanced sealing system helps control odors and prevents leaks effectively, although it is still recommended to monitor for any occasional mess.

The box supports cats from small kittens to about 33 pounds, with a special mode for very small kittens. Installation is straightforward with included support legs, and the unit weighs 22 pounds, so it’s stable but may be less easy to move frequently. The Neakasa app provides remote control and activity tracking, but it only works on 2.4GHz Wi-Fi networks and isn’t integrated with smart home systems. While it doesn’t use water for flushing like a traditional toilet, it offers automatic cleaning without the hassle of manual scooping.

Its size means it fits better in larger spaces, and it may be a bigger upfront investment than basic litter boxes. The product comes with a 2-year protection plan, adding reassurance for long-term use. This litter box is a good pick if you want a high-tech, low-maintenance solution for multiple or larger cats, especially if odor control and safety are priorities.