Sigg .4 Litre Aluminum Bottle (Hello Kitty Tat) A smart, safe and lightweight replacement to plastic sippy cups When replacing disposable bottles, boxes and pouches, it pays for itself after 10-15 uses 100% BPA-free EcoCare liner Independently tested to be free of BADGE, phthalates, and other harmful chemicals Aluminum with scent and taste-neutral liner that is resistant to acids in fruit juices & energy drinks