This is a silicone straw that attaches to 350-500ml plastic bottles. I'm selling it because I received multiple items when I only intended to buy one. It's new and unopened. Perfect for hospital stays or for children. - Brand: EDISON - Product Name: animarl straw - Color: Green - Application: For plastic bottles - Features: Easy-to-drink design, easy to open and close with one hand, with a weight ◆ With a weight The weight makes it easy to drink in any position. ◆ For 350-500ml plastic bottles only Simply attach it to commercially available plastic bottles (350-500ml). *Some bottles may not be compatible. ◆ Silicone straw Dishwasher and chemical sterilization safe. ◆ One-touch opening and closing Easy and convenient to open and close with one hand. Ships via Yu-Packet Post Mini. No cushioning material due to thickness restrictions.