A company in San Francisco, California, has found a way to turn used plastic bottles into women’s shoes.

Every day, millions of Americans drink water and other liquids from plastic bottles. More than 60 million of them are thrown away each day. Many of the plastic bottles end up in landfills or are burned with other waste products.

A San Francisco start-up company called Rothy’s, however, turns this plastic waste into environmentally friendly shoes. Roth Martin is the company’s co-founder. He explains how they turn plastic into soft material for women’s feet. They take the plastic, clean it, and break it down into small pieces. Then they press them through a device that makes soft fibers. Those fibers are then combined together. This is done by a 3D machine. It is designed to reduce waste while making the shoes. The knitted stuff and the inner part of the shoe are then attached to the shoe’s outer part, called the sole (鞋底). This outer sole is also made from environmentally friendly material: responsibly sourced no-carbon rubber.

Rothy’s shoes are sold online. They are flat shoes, with either a rounded or pointed toe. They come in different colors and designs. They cost either $ 125 or $ 145 per pair, depending on the design. After American actress Gwyneth Paltrow discovered them last year, the demand for the shoes grew. Martin says there is no shortage of material to fill that demand. “We’re not going to run out of water bottles any time soon. So we have a limitless supply of material, and I think that is a good sign for our future.” When the environmentally friendly shoes wear out, customers can return them at no cost to a company that uses the recycled materials to make other products.

For now, the shoes are only available to be shipped in the United States. However, the company says it will add international shipping in the near future.

Here are four homes for sale around the U. S. with links to past presidents, as well as their close families.

A modest farm near Middle burg, Virginia, was built by John F. Kennedy and his wife in the early 1960s. The former first lady designed it herself. The four-bedroom property is currently back on the market for $5.95 million, decreased by $10.99 million when it was first put up for sale in 2013.

Another Kennedy-linked property for sale is the “Lasata” estate in the Hamptons, designed by architect Arthur C. Jackson and built in 1917. Set on more than seven acres of land near the ocean, it includes a ten-bedroom house that was restored in 2007, including a three-car garage building. It’s on the market for $38.995 million, a little bit higher than last year.

Chester A. Arthur, who became the 21st president in 1881, spent some of his down time here. The three-story, six-bedroom Victorian mansion, which was built in 1796 and has been recently restored, is for sale with a $14.2 million price tag. Features include a library with fireplace, a formal dining and living room and a family room overlooking the garden and the swimming pool.

This Martha’s Vineyard home which was built in the late twentieth century served as the summer White House to former President Obama. It is currently for sale for $19.125 million, down from $22.5 million in July 2015. Set on nine-and-a-half acres of land and with its own private road, this property no doubt acts as a perfect summer hideaway for those who didn’t want his every movement seen. In addition to privacy, other features include a heated pool, a half-basketball court, outdoor terraces and a two-bedroom guest cottage.

Are you looking for a reading lamp/ If you are, here are some for you to choose from.