Come and Check Our Promo Solutions.Our collapsible water bottle is made of Food-Grade TPU material. 100% BPA and PVC free. No harmful substances. the collapsible water bottle is tasteless and eco-friendly and 100% safe, durable and lightweight with good toughness.They are very good and soft folding water bottles for running Hiking Cycling Climbing Travel etc. the folding water bottles can be folded and take up very little space when empty.( Recommended used temperature: 0 - 40 degrees ). Price over 5000 pcs is by sea shipment. Pls check inventory and detailed info with us before placing your orders.