REI has the 16 and 20 ounce Drinktanks pint tumblers on clearance.
DrinkTanks Pint Insulated Tumbler - 16 fl. oz [rei.com]
., assorted colors are $16.93
DrinkTanks Pint Insulated Tumbler - 20 fl. oz [rei.com]
.assorted colors are $18.93
Free store pickup, otherwise FS >$50.
These tumblers have a lid and a smaller footprint than most insulated tumblers so they fit smaller cup holders and are good for children who have grown out of sippy cups as they fit in most car seat cup holders too.