Update 8 months after purchasing - I just threw this cup out. It is very sturdy with a pretty good design but it's just too difficult to open and close. My son can't open the lid and my husband passes it to me because I bought the thing. Otherwise I liked the cup but I'm just tired of all the effort it takes to use.Original Review - This is a large cup that is well made. The straw is very wide and hard plastic, making it perfect for a real smoothie with a few chunks of berry. Not easily spilled. The lid is difficult to get on and off (my 9 year old can't do it). I might buy this again.