
We reinvented the pencil. Why not a bottle stopper?
g_cork is our circular economy design stopper.
Functional and aesthetically refined, its simplicity is only on the surface: g_cork is the result of merging patented materials and advanced production processes. By reclaiming graphite and cork, it reduces waste at the table. It represents Perpetua's vision of design: innovative, responsible, elegant, and 100% Made in Italy.



Un tappo semplice,
ma solo in apparenza
g_cork è il risultato dell’unione tra processi produttivi e materiali brevettati. Recupera grafite e sughero, per ridurre gli sprechi a tavola.
g_cork was born from the collaboration between two companies that treat material recovery and innovation as core tenets of their identity: Mixcycling—an innovative startup specializing in sustainable materials made from plant waste—and Alisea. By sharing know-how, values, and vision, we transform industrial waste into high-value design objects.


Design Beyond Form
The iconic shape of the g_cork head features a unique flat side, designed to prevent the cork from coming into contact with surface impurities. This design provides an unmistakable appearance while simultaneously ensuring a better grip on flat surfaces. Designed by Marta Giardini Studio and Labrenta for Alisea, it was selected for the ADI Compasso d'Oro.
Materials
g_cork combines patents and circular economy materials: Zantech (patented by Alisea, containing 80% g® upgraded recycled graphite) and Sughera (patented by Mixcycling, containing 70% recycled cork). These two materials are joined via our innovative NGS (No Glue System) co-molding process.

Zantech
A patented, versatile technical compound available in injectable granules.
Industrial graphite byproducts are sieved, reduced to a precise particle size, and upgraded with a mineral excipient to produce g® upgraded recycled graphite. This ingredient is then combined with other polymers to yield granules perfectly suited for injection molding.

Sughera
Sughera is available in 6 colors, utilizing exclusively plant-derived, FDA-certified pigments safe for food contact.
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