I received this in the mail and I love both the flip lid and the sport straw,I tried them all,I tried putting my cirkul lid on it to seif it would fit to use with my cirkul cartridges and it actually fits!! I love how the black looks sleek and nice.I take it everywhere with me.It stays cold for a good amount of time and just the right size.Thinking about buying a purple one.I love this bottle,Good quality and not cheaply made.