While many vintage Pyrex bowls are cherished, some should be kept out of donation bins due to safety concerns or low collector value. Here are six types you should avoid donating:

1. CorningWare with Lead Paint

Some older CorningWare pieces contain lead-based paint, posing health risks. Always check for lead content before considering donation.

2. Pyrex with Significant Chips

Bowls with noticeable chips or cracks compromise safety and usability. Donating damaged items can lead to potential harm for future users.

3. Unmarked Vintage Bowls

Bowls without identification can lack value and provenance. Donating these items may not benefit collectors or users.

4. Pyrex with Stains

Severely stained bowls may be deemed unusable. Donating heavily stained items can reflect poorly on the donation center.

5. Rare Patterns in Poor Condition

Even rare patterns can lose value if in poor condition. It’s best to keep these bowls for personal use rather than donate.

6. Mixing Bowls without Lids

Many Pyrex mixing bowls come with lids, which enhance functionality. Bowls without lids may not be as desirable for donation.