Frequently Asked Questions

Everything you need to know about our sustainable lunchboxes, water bottles, and accessories.

What materials are used in Black+Blum products?

We prioritize durability and sustainability by using high-quality materials such as 304 (18/8) stainless steel, hand-blown borosilicate glass, natural cork, and sustainably sourced wood fiber.

Are your lunchboxes and water bottles leak-proof?

Yes, most of our range features high-quality silicone seals to ensure they are 100% leak-proof. Please check the specific product description for the leak-proof icon.

How should I clean and maintain my Black+Blum products?

While many of our stainless steel and glass products are dishwasher safe, we recommend hand-washing items with wood or cork components to preserve their longevity. Specific care instructions are included with every purchase.

Do you offer international shipping?

We ship our products worldwide. Shipping costs and delivery times vary by location and will be calculated automatically at checkout.

What is your return policy?

We offer a 30-day return policy for unused items in their original packaging. If you are not satisfied with your purchase, please contact our support team to initiate a return.

Are your products BPA and BPS free?

Absolutely. All Black+Blum products are 100% BPA, BPS, and phthalate-free, ensuring your food and drinks remain safe and uncontaminated.