I got this to have with me by the pool and keep bugs and pool water out of my drinks. 
Its perfect!
Love the way the top twists and lifts up. 
The part to drink from is perfect size and its not too big so dont have any problems when im taking a sip. 
It keeps my carbonated drinks bubbly for much longer as well. 
It was out in the sun for hours and the outside was hot but the inside was just as cold and i was super impressed. It works amazing and ive been taking it with me everywhere now. 
Its very easy to clean and love the handle that it has and it makes it easy to carry. 
I am very happy with it.