The only use these had was on display with my moms “ blue glass” They were never used for cooking. This product is a set of four vintage cobalt blue Pyrex glass nesting bowls, made in America during the late 20th century. These round mixing bowls are gorgeous They are microwave and dishwasher safe, featuring the iconic cobalt glass production style and fused glass production technique. The set includes a bowl set that is a great addition to any kitchen.
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