The Pampered Chef 1-cup Prep Bowl Set Set of six. Bowl measures 1 cup (250 mL) to the rim. Measurement markings display for , , and  cup on one side; 50 mL, 125 mL, and 175 mL on the other side Tempered glass bowls are heat safe to 350F (180C). Set includes plastic lids to store ingredients until ready to use or for storing leftovers. Bowls nest without lids for efficient storage. Measure marks (etched in so they wont disappear over time) included as a guide when prepping ingredients Stack bowls to save room in refrigerator or pantry.