Features:-Two in one design — converts from open cup to straw cup to grow with your child -Lightly weighted base provides stability from tipping -A snug fit holds the lid in place for splash-free sipping -Soft 100% food-grade silicone is gentle on gums and easy for little hands to grip -4oz capacity perfect for water or milk -Free of BPA, BPS and PVC -Easy to clean, top rack dishwasher safe -6+ months