I purchased a to-go buddy that comes with a lid on black Friday. I love it so much because ice cubes in Dunkin medium ice coffee last more than 10 hours! I am very impressed. I also love that a to-go buddy can immediately serve as a tumbler as it comes with a lid. I also bought a to-go buddy handle since this 32 oz tumbler is giant to hold with my hand. After I have a to-go buddy with a lid and a handle, I'm super satisfied! Now I can enjoy ice water for more than 12 hours in my warm office. It has become my daily companion. Two things can be improved. The first thing is that there is a limited number and color selection for a to-go buddy that comes with a lid (this lid costs $9.99 if purchased separately). The second thing is that it would be better to have a screw-type lid rather than a rubber-packing lid because the rubber-packing-type lid sometimes pops out a little bit automatically (due to internal pressure?) and becomes loose and leaky. I have to press the lid from time to time to make sure that the lid can tightly seal the tumbler. Other than that, I really love my to-go buddy. They deserve their name 'Frost buddy'.