Frequently asked questions

We have a selection of replacement lids available for purchase on our website here.

If you are unable to find the item you are looking for, please contact us here.

Our glass bottles are made of soda lime glass, FDA food-grade silicone and plastic. Our lids allow you to drink directly from glass, not plastic.

Our stainless steel water bottles are BPA free and are made from high-quality, 18/8 food-grade stainless steel. This material is highly resistant to rust. 

Our plastic bottles are made of Eastman Tritan™ BPA-free plastic and FDA food-grade silicone.

We take your health and well-being seriously. To ensure all of our products are safe we rigorously test them for compliance through FDA accredited 3rd party labs.

These test labs verify that our products conform to California Prop 65 standards for heavy metals. This assures that our products pose no risk of BPA/BPS, phthalates, polycarbonate, lead, latex, PFAS, or cadmium exposure to consumers.

We will always share product information so you can make informed decisions. Email us at

Our bottles are designed in Chicago and their components are carefully made in China.

For quality assurance all of our products and components are inspected by Bureau Veritas, one of the most reputable global leaders in conformity assessment and certification services and were certified to pose no risk of leaching chemicals like BPA, phthalates, PVC, polycarbonate, lead, cadmium and latex.

ZULU's Guardian® Technology is an FDA and EPA approved antimicrobial additive that inhibits mold and bacterial growth to keep silicone food-contact surfaces cleaner.

Guardian's antimicrobial additive is a specific proprietary solution which is infused into our silicone during the manufacturing process, and has the ability to inhibit the growth of microorganisms (like bacteria, mold and mildew) throughout the useful life of the product. This keeps the bottle fresher and cleaner for longer, and fights against product-damaging microbes that can quicken its deterioration.

Our antimicrobial additive does not wash off or wear away, and will continually fight against potentially harmful bacteria that makes contact with the surface of the product.

product guarantee

At ZULU, we stand by our products and want to work hard for your loyalty. All ZULU products purchased are guaranteed against manufacturing defects for a period of 6 months from the date of purchase, unless otherwise stated. Glass is not covered by warranty. If a manufacturing defect is found, we will be happy to repair or replace your product. Proof of purchase must be provided upon request in order to verify warranty coverage. Please retain purchase receipts for your records. If the item was not purchased directly from our website, please contact the retailer which the product was purchased from for returns, exchanges and refunds. ZULU’s Product Guarantee applies to bottles and replacement lids purchased and used in the United States only. A manufacturing defect is defined as any fault in the product’s materials or workmanship, which is present at time of receipt. The following conditions are not classified as manufacturing defects, and will not be covered by the manufacturer’s warranty:

Accidental damage (e.g. dropped/tipped product)

Broken/cracked/chipped glass as a result of a drop, tip or fall

Normal wear and tear (e.g. scratches, paint chips, fading, dents, etc.)

Improper care (e.g. dishwashing or microwaving when not permitted) and abuse

Cleaning related issues (e.g. odor, staining, mold, debris collection)

General product misuse/abuse

Melting caused by overheating or dishwasher use

Any product which has been modified or repaired by anyone other than ZULU

For replacement parts, please email us at We will then promptly respond to your inquiry within 24-48 hours.

ZULU will repair or replace, at its discretion, any defect in materials or workmanship for a period of 6 months from the date of purchase. We strive to quickly replace defective products with current inventory and sometimes that means a comparable product.

Care and use instructions

We recommend hand-washing any stainless products to extend product lifetime. We do not recommend using chemicals on your bottle. This can ruin or rust stainless steel. Plastic lids and straws are top rack dishwasher safe.

Use baking soda for cleaning: For those stubborn spots inside your stainless bottle, mix 2-3 tablespoons of baking soda with a small amount of warm water to form a scrubbing paste. Dip the bristles of your bottle brush in the paste and work paste into the affected area on the inside of your bottle. Repeat as necessary until the stain disappears.

Use white distilled vinegar for cleaning: You can use household white distilled vinegar to help remove any stains or discoloration on the inside of your bottle. We recommend putting ½ cup of vinegar in your bottle, gently swirling the vinegar around to wash any affected areas and let sit for 5 minutes. Rinse thoroughly with warm water and repeat if necessary.

Do not put your stainless bottle in the microwave as it will damage the vacuum seal of the bottle. The vacuum seal keeps any liquid you place inside hot for 12 hours, so there’s no need to put it in the microwave.

The best way to clean and sanitize your bottle is by washing it regularly in a dishwasher, then letting it air dry completely. Simply place the bottle on the bottom rack and the lid on the top rack of your dishwasher.

Please see individual product pages for details about specific items.

No need to remove the silicone sleeve for cleaning – we recommend keeping it on.

We do not recommend freezing your bottle or leaving it in a freezing vehicle, as this may cause the bottle to crack.

Wash and rinse the product thoroughly before using.

Water bottles and sealing travel mugs are not intended for carbonated beverages. Carbonation creates pressure and may cause products to leak.

Do not microwave. Select bottles contain a metal hinge pin.

Do not use abrasive cleansers on products.

If a glass bottle breaks or cracks, dispose of it immediately.