Patented spiral design allows the bottle to be compressed to take up less space, which also reduces its carbon footprint during shipping. 100% Plastic Free (BPA Free & Non-Toxic) Lightweight & Compact Wide Mouth for Ice Cubes Taste & Odor Free Leakproof & Shockproof Temperature Resistant up to 400F Dishwasher Safe.Materials: 100% Food-Grade Silicone (Bottle), 18/8 stainless steel (Cap) Collapsed Height: 4.8in Collapsed Capacity: 8 fl oz Expanded Height: 8.4in Expanded Capacity: 20 fl oz