Frequently Asked Questions
Everything you need to know about our sustainable food and drink containers.
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 natural wood fiber composites. All our products are 100% BPA and BPS free.
Are your lunch boxes leak-proof?
Many of our designs, such as the Stainless Steel Lunch Box and Glass Lunch Bowl, feature high-quality silicone seals and secure closures to ensure they are fully leak-proof and vacuum-sealed for transport.
How should I clean and maintain my Black+Blum products?
Most of our stainless steel and glass components are dishwasher safe. However, to preserve the longevity of natural materials like cork or wood lids, we recommend hand washing and air drying those specific parts.
What is your shipping policy?
We offer standard and expedited shipping options. Orders are typically processed within 1-2 business days. Free shipping is available on orders over a specific threshold depending on your delivery region.
What is your return policy?
We offer a 30-day return window for unused products in their original packaging. If you are not completely satisfied with your purchase, please contact our customer service team to initiate a return or exchange.
Do you offer a warranty on your products?
Yes, we stand by the quality of our craftsmanship. All Black+Blum products come with a 2-year warranty against manufacturing defects to ensure your food and drink containers last for years to come.