Pyrex does not go with normal glass.
PIE-reks — the brand name is pronounced the English way in Italian; 'y' is treated as 'ai'.
Use this when helping someone sort waste or when uncertain about a specific glass item. This is one of the most common recycling mistakes Italians make, and knowing the rule marks you as a careful recycler.
Pyrex (borosilicate glass) has a different chemical composition and melting point from standard container glass (soda-lime glass). If Pyrex enters the glass recycling stream, it causes defects in the recycled glass batch. Pyrex goes in general waste (indifferenziato) or the isola ecologica. The same applies to ceramics, porcelain, and mirrors.
Anche le ceramiche vanno nell'indifferenziato.
Ceramics also go in general waste.
Same rule; ceramics cannot be recycled with glass.
Gli specchi non si riciclano con il vetro.
Mirrors cannot be recycled with glass.
Mirrors have a reflective metallic coating that contaminates glass recycling.
Se hai dubbi, controlla l'etichetta o l'app del comune.
If in doubt, check the label or the municipality app.
Practical advice for uncertain cases.
CONAI and the main Italian waste management companies have produced detailed sorting guides (guide alla raccolta differenziata) specifically to address common doubts like the Pyrex question. Many municipalities now have QR code stickers on bins linking to these guides — scan and check before you throw.