hello i am also writing about the nuby cups. i have been useing them for a while but our biggest problems are that after a while the silcone spout gets a split or it leaks. my kids love these cups and they are the only cups they will take at night. i now have about 30th of these cups because i have to keep getting new ones because the spout has a split. i've even tried to get then to sell just the spout but they won't and i can't see just throwing them away,there not any thing wrong with the cups just the spout. thanks danielle