I received this as a gift, but I already have one and won't be using it, so I'm selling it. This is a 340ml children's water bottle with a W-rack-pita structure designed to prevent leaks. - Brand: Combi - Model Name: LakuMug Straw 340 - Capacity: 340ml - Features: W-rack-pita structure, spill-prevention valve - Target Age: 6 months and up - Materials: Polypropylene, Silicone Thank you for looking.