Tervis Products, manufactured since 1946, are… quite simply the best!  They keep drinks colder, longer and their double-walled construction reduces condensation and helps prevent rings.  In addition they are dishwasher safe and extremely durable. 

The Big-T tumbler is a great cup to carry around or take to the pool or the gym.  We keep them on our desks at TheMonogramStore.com studio and sip from them all day long!   Greatly appreciated by anyone who uses a sports bottle.  See link below for the tops and straws.