At O3, we’ve chosen borosilicate glass as the foundation of our drinkware for its exceptional durability, clarity, and safety. Unlike most other drinking cups made with soft glass, which is prone to scratches, breakage, and wear over time, borosilicate glass offers unmatched strength and resilience. Its robust nature ensures your O3 cup maintains its elegance and utility for years to come.

Borosilicate glass, first developed in the late 19th century, has been trusted in scientific laboratories and premium glassware for its stability and resistance to breakage. Soft glass, commonly used in many drinking vessels, lacks the durability and thermal stability of borosilicate, making it more susceptible to damage and less suited for everyday use. By contrast, O3 cups are designed to stand up to life’s demands while offering a refined drinking experience.

In addition to its strength, borosilicate glass is entirely lead-free, BPA-free, and non-toxic, making it the safer and more sustainable choice for drinkware. Its exceptional chemical resistance ensures your beverages remain pure and free from unwanted contaminants. At O3, we prioritize your health and peace of mind without compromising on style or function.

Crafting borosilicate glass requires higher temperatures and more precise manufacturing techniques than soft glass, which is why it is more costly to produce. However, we believe the investment in quality is essential. Every O3 cup is meticulously crafted to deliver an experience of refined simplicity, ensuring that your drinkware is as durable as it is beautiful.

Additionally, O3 cups are dishwasher-safe, offering you the convenience of easy cleaning without compromising their quality. Whether you’re enjoying chilled water, juice, or your favorite beverage at room temperature, your O3 cup enhances the moment with its unmatched clarity, strength, and design.

Our commitment to using borosilicate glass ensures that every sip is as safe, enjoyable, and sophisticated as it is sustainable.