How an engineering student turned red Solo cups into stylish sweaters: ‘A lot of trial and error’

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If you’ve been connected a assemblage field successful nan past 30 years, you’ve apt travel crossed reddish statement cups. Made by brands for illustration Solo and Hefty, nan iconic cups are beloved by frats, important to drinking games for illustration brew pong – and very difficult to recycle because of nan type of integrative they’re made from.

But Lauren Choi, an engineering student astatine Johns Hopkins University, saw an opportunity: she wanted to move these problematic cups into fabric. In 2019, during her elder year, she led a squad that built an extruder instrumentality that could rotation integrative discarded into textile filaments. They collaborated pinch field fraternities to stitchery thousands of reddish cups that could service arsenic nan earthy material.

Choi past took a weaving people astatine a Baltimore, Maryland, shaper abstraction truthful she could make a sample cloth retired of those filaments. That became nan instauration for The New Norm, a textile institution that coming transforms a assortment of post-consumer recycled integrative into stylish sweatshirts and beanies.

“I’ve ever thought long-term,” Choi said. “And that helps maine look beyond nan adjacent mates years, [to the] bigger picture, wherever globally, [the integrative crisis] is thing we request to address.”

The institution is simply a earthy hold of Choi’s longstanding interest astir nan dual ambiance and plastics crises and a heavy relationship to fashion. She had been sewing since she was a child, interned astatine a swimwear institution earlier successful college, and – earlier teaming up pinch classmates – spent a summertime trying to build an extruder instrumentality successful her parents’ garage. “[The New Norm] really tied my interests together,” she said.

After graduating successful 2020, Choi raised assistance backing truthful she could dive much into merchandise development. “That helped it spell from a passion task to a real, existent project,” she said.

four women opinionated successful sweaters
Isabelle Callaghan, Alicia Furlan, Lauren Choi, and Camille Afable airs for portraits successful nan statement sweater made retired of recycled integrative successful Boston, Massachusetts, connected 13 September 2025. Photograph: Faith Ninivaggi/The Guardian

Choi started moving pinch suppliers who root plastics from recycling accommodation crossed nan country. “Recycled [materials are] still nan chaotic west,” she said. “We received batches that were unusable aliases contaminated aliases excessively mixed. It was a batch of proceedings and correction to find nan correct people.”

Another challenge: Up until that point, nan cloth coming retired of nan extruder still had a distinctly brittle, integrative consciousness – it didn’t consciousness wearable for illustration a accepted textile. So Choi reached retired to Gaston College’s Textile Technology Center, conscionable extracurricular Charlotte, North Carolina, for help.

“If you’re going to nutrient a knit garment, it needs to beryllium comfortable,” said Jasmine Cox, nan center’s executive director. “It needs to beryllium breathable, cozy, things that group love. It can’t consciousness for illustration a integrative cup.”

Cox’s team, on pinch group astatine nan Polymers Center successful North Carolina, helped Choi create a civilization look that could beryllium fed into extruders to nutrient soft textiles. “Our full extremity [was] to get her to that constituent wherever it was plug and play,” Cox said.

It took them a mates years, and much assistance backing (from Johns Hopkins, Garnier, and Reynolds Consumer Products, Hefty’s genitor company, among others), to get to that point. The New Norm released its first, direct-to-consumer postulation of sweaters and beanies successful precocious 2023. Made from 5,000 upcycled statement cups, nan driblet sold retired successful 2 months.

Choi useful pinch textile accommodation successful North Carolina and Virginia to nutrient The New Norm’s yarn, overmuch of which is past shipped to Brooklyn, wherever a shaper uses 3D printers to nutrient sweatshirts and beanies, which unit betwixt $45 and $85.

“3D knitting has a batch little discarded compared to accepted cut-and-sew, wherever galore cloth scraps are wasted,” Choi said. “Instead, our pieces are knit consecutive retired of nan instrumentality without immoderate seams – it’s conscionable 1 afloat garment that doesn’t request further sewing.”

two women smiling
Alicia Furlan and Camille Afable exemplary nan statement sweaters and statement beanie made retired of recycled plastics by The New Norm. Photograph: Faith Ninivaggi/The Guardian

Even though nan institution now uses a assortment of plastics, multicolored statement cups still dress up astir of nan earthy materials successful its ain line. The items’ pink, bluish and greenish pastel hues travel from nan cups themselves alternatively than added dyes. Choi said her yarn is made from continuous filaments, alternatively than fibers that are spun together, which intends it’s little apt to shed harmful microplastics.

The New Norm is still a thin operation: Choi, who precocious moved to Boston to prosecute an MBA astatine nan Massachusetts Institute of Technology, said astatine immoderate fixed clip location are betwixt 3 and 25 group moving astatine nan company. She declined to stock income figures, but said that successful nan past 2 years accumulation had expanded from tens of pounds per tally to thousands.

Choi said she intends to grow nan business-to-business broadside of The New Norm, which she sees arsenic offering nan biggest opportunity for an biology impact.

“From nan beginning, our extremity has been to get to a spot wherever we tin standard accumulation and activity pinch really ample brands who are utilizing important quantities of materials,” she said. The New Norm is undergoing pilots pinch ample brands, testing everything from nan spot of nan yarn to really good it launders, pinch nan extremity of processing and trading nan worldly astatine a overmuch larger scale.

This aligns pinch wherever immoderate experts spot nan manufacture going, arsenic a increasing number of companies rethink wherever they root their earthy materials. One report recovered that nan sustainable textile marketplace was weighted globally astatine $29.5bn successful 2024, and is expected to deed $71bn by 2031. (While what constitutes “sustainable” is somewhat nebulous, astir investigation defines it arsenic textiles made pinch eco-friendly material, including recycled fibers, which minimize water, chemicals, and c emissions.)

For her part, Choi hopes The New Norm tin put a dent successful nan global plastics crisis, which has reached disastrous levels. The world produces 200 times arsenic overmuch integrative coming arsenic it did successful 1950, little than 10% of which is recycled. There’s an estimated 8bn tons of integrative contamination crossed nan globe, and conscionable 3 integrative chemicals origin arsenic overmuch arsenic $1.5tn successful yearly wellness costs.

Cox said Choi was early successful position of reasoning astir really to toggle shape integrative into textile. And while location are different companies that move integrative and textile discarded into yarn, Cox said Choi’s attraction connected nan statement cup was unique, particularly because of wherever it could lead. “Food containers, nutrient packaging, that’s thing that we don’t deliberation about,” she said. “Everyone throws it retired daily, and location haven’t been galore solutions.”

Some mightiness mobility if we really want to beryllium wearing apparel made retired of plastic, but nan reality is we already are. More than 60% of fibers produced worldwide are synthetic, nan immense mostly of which are derived from virgin fossil fuels, according to a 2024 study from Textile Exchange, making nan manner manufacture a awesome contributor to greenhouse state emissions. Cox and Choi some acknowledged really overmuch needs to beryllium done to trim integrative usage, but spot upcycling arsenic an important first step.

“It would beryllium astonishing if we lived successful a plastic-free world,” Choi said. “But if you look astatine nan measurement of virgin, synthetic fibers made annually, we’re talking billions of tons of material. There’s a agelong roadworthy to go.”

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Source theguardian.com
theguardian.com