Yes, Glasbake Bowls were designed to be used in the oven and are heat-resistant. However, since these are vintage items, it is recommended to avoid sudden temperature changes (thermal shock), and they may not be safe for use in modern microwaves due to their age.

To clean your Glasbake Bowl, hand wash it with a mild soap and warm water. Avoid placing it in the dishwasher, as the high heat and harsh detergents could damage the bowl or its finish. Do not use abrasive scrubbers that could scratch the surface.

No, Glasbake Bowls are not designed for stovetop use. They are intended for baking and serving purposes only. Using them on a stovetop could cause cracking or breaking.

Authentic Glasbake Bowls often have the "Glasbake" logo or marking on the bottom of the dish. These markings may vary depending on the production year but are typically embossed into the glass. Some bowls may also have patterns or designs that were unique to Glasbake collections.