Tough to Tip cups are perfect for helping little ones make the transition to open cups. With a base that’s wider than the top, these cups are practically impossible to tip over, and the ridged sides make it easy for children to grasp. Made of BPA free plastic that is dishwasher safe. They work perfect for baby led weaning as well as going straight from a bottle to an open cup, which has been shown to be better for your little one's oral health