Includes 9 nesting bowls: 1 ounce, 2 ounce, 4 ounce, 6 ounce, 10 ounce, 1/2 quart, 1 quart, 1- 1/2 quart, 2-1/2 quart capacity Duralex is 2-1/2 times more resistant to breakage and chipping than normal glass Duralex can also withstand sudden thermal shock: from -4°F to 212°F. Cleaning - Wash before use.Soak the dish in soapy water for 20 minutes.Do not use metallic sponges, pads, powders or abrasives.To remove hard water stains, try vinegar. If this doesn't work, we suggest trying a hard water product called LemiShine which can be found at the local grocery store. Then trying soaking your glassware in LemiShine and warm water Duralex glass is very hygienic: It is non-porous and does not absorb liquids, colors or flavors Dishwasher, fridge and microwave safe; products maintain the original look for years