Glass Storage Jars

A: Avoid Sudden Shocks: Don't pour boiling water directly into a cold glass jar. This creates extreme stress and greatly increases the chance of breakage. Instead, preheat the jar with warm water or gradually add hot liquid. Handle with Care: Always handle hot glass jars carefully.

A: Once the jars have cooled to room temperature, check the seals by removing the rings, grasping the jar by the edge of the lid, and gently lifting it an inch or two off the countertop. If the lid holds fast, the seal is good.

A: Glass containers can outlast the lifespan of plastic containers in the kitchen if they are properly taken care of. Plastic is prone to melting or discoloration whereas glass remains a durable and long-lasting solution for food storage.

A: One Mason jar is completely multifunctional and perfect for both your morning cup of hot coffee or your afternoon cold brew. Unlike most tumblers and travel mugs, Mason jars are nonplastic, nontoxic, nonreactive glass.

A: Yes, you can microwave most glass items as long as they are labeled “microwave safe”. Kitchen wares, such as glass items, that have the “microwave safe” label are made of materials that are safe to be used in the microwave.

A: Mason jars can tolerate heat up to approximately 392°F (200°C) under gradual heating conditions but are prone to thermal shock with sudden temperature changes. Newer mason jars made from tempered glass are generally microwave-safe, but precautions should be taken to avoid sudden temperature changes.

A: The idea that flipping jars upside down will somehow keep food fresher and safer for longer also shows up in a process called inversion canning. That's a method of preserving that involves boiling foods, jarring them, then letting them sit upside down.

A: These inert and impermeable qualities of glass make it completely safe for food and drink usage. The safety of glass has been demonstrated in many studies and is generally recognized as safe by governments and legislation. The exception is certain types of glass that may have toxic lead or cadmium in them.