Glasslock is made of tempered glass, guaranteeing excellent hardness, durability in comparison with general glass has an absolute airtight function keeping the liquid, moisture and smell inside. There is no trace of harmful environmental hormones to the human body when using microwave ovens. This Container Food Storage Set with Lid feature a space saving design. Durable silicone seal provides airtight and leaks proof storage. It is ideal for serving and storing and safe for microwave cooking. Glasslock is BPA free. The plastic in most food containers has BPA chemicals that when microwave, the food ingests the BPA chemical not good. This set feature a space saving and nesting design. All natural glass vessels with airtight lids.
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