Low Flow Toilets: 
A low-flush toilet or low-flow toilet is a flush toilet that uses significantly less water than a full-flush toilet. Most low-flush toilets use 6 liters (1.6 gallons) per flush as opposed to the usual 13.2 liters (about 3.5 gallons). They came into use in the United States in the 1990s, citing water conservation concerns. 

Dual-flush Toilets: 
A dual-flush toilet is a variation of the flush toilet that uses two buttons or handles to flush different levels of water. It was invented by Australian inventor Bruce Thompson in 1980 while working for Caroma, and although the first generation dual-flush toilet caught on, a redesign in 1993 cut water usage in half when used properly. It has been proven to save up to 67% of water usage in most homes. Due to the more complex mechanism, it is more expensive than many other types of low-flow toilets. 

Bidets: A “Paperless” Toilet: 
It’s probably not something you’ve spent a lot of time pondering, but how sanitary is it to use toilet paper? For people in many countries, using a tissue to clean themselves after going to the bathroom is the exception rather than the rule. Instead, they use of a bidet is far more common, and those who use one often say they can never go back to toilet paper again. A bidet is, quite simply, an apparatus to wash your genitals and anus after you’ve done your business. It originated in France in the early 18thcentury (the word comes from the French word for “pony”) but it has since evolved into a high-tech type of toilet used in many countries across Europe and Asia. In fact, more than 70% of the Japanese population uses a bidet or “paperless” toilet, and it has become a way of life there.

Composting Toilets: An eco-friendly alternative
A composting toilet is a dry toilet that uses a predominantly aerobic processing system that treats excreta, typically with no water or small volumes of flush water, via composting or managed aerobic decomposition. Composting toilets may be used as an alternative to flush toilets in situations where there is no suitable water supply or waste treatment facility available or to capture nutrients in human excreta as humanure. They are in use in many of the roadside facilities in Sweden and in national parks in Canada, the United States, and the United Kingdom.

Toilets For The Disabled: 
Toilets for the disabled need to have the right mix of utility and aesthetic appeal.
An accessible toilet is a special toilet designed to accommodate people with physical disabilities. Public toilets and restrooms can present accessibility challenges for people with disabilities, for example, those in wheelchairs. Stalls may not be able to fit a wheelchair, and transferring between the wheelchair and the toilet seat may pose a challenge. Accessible toilets are designed to address these issues by providing more space and bars for users to grab and hold during transfers.