In an age of toxic this, chemical-leaching that, these glass containers are a clear choice for our eats. The only warning we can attach to these handy little containers is don't loan them out, or they may not come back! Crafted from BPA-free glass enveloped in a sturdy silicone sleeve. Unlatch the top and it's microwave, oven, freezer and dishwasher safe. Plastic top. Holds 2 cups.