4 oz Black Glass Jars

About

Our 4 oz black glass jars come in two finishes — black frosted and black UV — both built on a straight-sided 58-400 neck, so they're ready to pair with a wide range of closures. If you're formulating anything that reacts to light, this is the size and shade our wholesale buyers reach for most. Looking for a different size in the same finish? Check out our full black glass jars collection , or if color's flexible but 4 oz isn't, browse all 4 oz glass jars . Built for Light-Sensitive Formulas Black glass isn't just a look. Both the frosted and UV finishes block light transmission, which matters if what's inside breaks down under sun or shelf lighting — think retinol serums, CBD salves, or botanical tinctures. Brands packaging anything photosensitive tend to go black or amber first and ask about capacity second. A Size That Pulls Double Duty 4 oz sits in a sweet spot — big enough for a full-size body butter or hair pomade, small enough that it doesn't feel like overkill for a travel or sample line. We see it a lot in private label skincare, but it's also a common pick for spice blends, bath salts, and small-batch candle work where a wide mouth makes filling easier. Why Glass Over Plastic Glass doesn't leach into your product, doesn't hold onto old scent or residue between fills, and doesn't scratch up the way plastic does after a few trips through a fulfillment line. For anything oil-based or alcohol-based, that's not a small thing — plastic can degrade with certain formulas over time. Glass just doesn't have that problem. Who These Jars Work For Food and beverage brands packaging spices, dry herbs, or specialty salts where a wide-mouth jar makes scooping easier Cosmetics and skincare lines filling body butters, scrubs, and balms that need a jar wide enough for a spatula or finger scoop Essential oil and aromatherapy brands storing infused oils or solid perfumes that benefit from reduced light exposure Pharma and tincture makers packaging salves, ointments, and topical