Designers and models paraded their trashy creations in front of a 60-strong audience at the Golden Gate Lodge as three guest judges assessed the costumes.
The competition attracted 13 garment entries over three categories including evening wear, wearable art, and cloaks.
The combined effort entered by Cromwell designers Mel Armstrong and Mandy Elliott depicted a trashy bride and groom. Karen Lindsay, of Cromwell, called her garment Plastic Fantastic Petro Babe, as it was made from recycled petro products.
Cromwell model Marijke Topping happily wore The Milkyway gown throughout the evening, which was designed by her mother, Vicky Topping, and comprised used milk bottles.
Golden Gate general manager Glen Christiansen said the evening was "just a bit of fun", providing a chance for creative Cromwell residents to show their ability.
"We hope to make this an annual event and get entrants from throughout the district next year," he said.
The best creations earned their designers prizes from Mitre 10 and Envisage Changes, and Central Otago wine.