Acrylic. Keep herbs fresher longer! Store 1-3 bunches of fresh herbs such as parsley, cilantro or oregano for up to 3 weeks in the refrigerator or on the counter without cross flavoring. The keeper also works great for keeping asparagus fresh and hydrated. Helpful herb guide included. Designed for domestic kitchen use.
I got one of these as a gift, and it developed hairline cracks, so the company replaced it. It was not dishwasher safe. One day I took it out of the refrigerator, and started to wash it out by hand. The water was hot, and it cracked all over rendering it useless.
It worked great to keep herbs, but it's not durable