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 high-quality, durable materials including 304 (18/8) stainless steel, hand-blown borosilicate glass, sustainably sourced cork, and BPA-free wood fiber composites.
Are your lunchboxes leak-proof?
Most of our lunchboxes feature a high-quality silicone seal and a secure vacuum valve or clip system, making them 100% leak-proof and suitable for liquids like soups or sauces.
How should I clean and maintain my products?
While many of our stainless steel and glass components are dishwasher safe, we recommend hand-washing lids and natural wood or cork elements to preserve their longevity and finish.
Do you offer international shipping?
Yes, we ship our products worldwide. Shipping costs and delivery times vary by region and will be calculated at checkout based on your location.
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 Black+Blum products microwave safe?
Our glass and wood fiber ranges are microwave safe. However, stainless steel products should never be placed in a microwave unless specifically stated in the product manual.