These 20oz tumblers are great for both hot and cold. The lid is spill proof as it closes both ways to have a nice sip for your coffe or more of a water bottle style for cold drinks. 
 
The tumblers are 20oz and are great for on the go. They keep drinks cold for 8-12 hours and hot for 4-6 hours. They are great for on the go and will fit in most cup holders.