The Nest Lid is composed of BPA Free polypropylene and designed with a high wall splash resistant feature. Integrated with our proprietary threading and a 3-hole drinking port, the result is an easy to sip, hold and drink coffee companion for the adventures ahead. Tech Specs Dimensions: 1.6” Tall / 3.4” Diameter Weight: 1.4 oz (40g) - Nest Lid - BPA-Free Food Grade Polymer Care For optimal care, this product is recommended for hand washing only.