Introducing the Owala FreeSip water bottle, available in various sizes including a convenient 40 oz water bottle.  This is the model I have; Pita has a slightly smaller one.  Usually very expensive, but soooo worth it!  I’ve filled mine with cold water, sat on the patio and even though the outside was hot! the liquid never got even warm.  Very pleased.  And you can either gulp or use the attached straw.  Woot already sold out of the smaller sizes and who knows how long the larger one will last, especially with that extra $5 discount.