Glasslock is made of tempered glass, guaranteeing excellent hardness and durability in comparison with general glass, and has an absolute airtight function keeping the liquid, moisture, and smell inside. There is no trace of harmful environmental hormones in the human body when using microwave ovens. These clear, stainproof glass containers feature a space-saving design. A durable silicone seal provides airtight and leak-proof storage. It is ideal for serving and storing, and safe for microwave cooking. Glass lock is BPA Free!! The plastic in most food containers has BPA chemicals that when microwaved, the food ingests the BPA chemical which is not good!! These clear, stainproof glass containers feature a space-saving, nesting design. All-natural glass vessels with airtight lids.
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