Crafted with Recycled and Recyclable materials, these deep drawn aluminum bottles are durable and Eco-Friendly :-) The Interior Flexible Food Grade Coating ensures the longevity of the bottle and prevents metal leaching. 100% BPA Free, Non-Toxic and Non-Leaching. You don't have to turn and turn the cap to close it. It's threadless and features a 1-4-turn on-off design for fast closure. The Wide Mouth design is Ice Cube friendly and easy to clean. The Tapered Neck provides a splash-free drinking experience which is always a nice feature for a SIONICS Weapon Systems customer.