Grew up in a home that used nothing but pyrex bowls, measuring cups, bakeware, and stovetop cookware (back when it was available). It was easy to handle, clean, and use, tough in daily use, heat resistant, stainproof, and didn't add taste to whatever we were cooking. We also found the measuring capacities extremely accurate. I recently rebooted my household, and this was a replacement cup - still wonderful stuff.  I bought all sizes of the pyrex prepware cups, actually, so I had a matching set. There are cheaper measuring cups out there, including plastic, but you get what you pay for - these can be passed down/along to family members. They're that reliable.