These are Vintage Anchor Hocking cobalt blue glass nesting mixing bowls. Initially produced starting around the 1980s, this specific ovenware collection features a distinct thick rim with an integrated outer collar ridge designed for stacking and easy gripping. This distinguishes them visually from competing vintage cobalt lines like Pyrex, which generally feature wider, flatter lips.Because they are made from tempered glass, these pieces were originally marketed as being multi-functional and are safe to use in conventional ovens and microwavesBoth are in very good condition.
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