You may be sweating in the sun but lets keep your drinks from doing the same. Can't have a hot day and hot drinks at the same time, make sure your drink stays cold all day. 
 
Double-wall stainless steel construction
One size: 20oz (0.6l)
Easy sipping, clear push-on plastic lid
Narrow mouth opening
Ribbed at the bottom for optimized grip
Glossy varnished print
Hand wash only