The GUS 30 oz is a homerun for me!
I bought this mug to use at work for cold drinks, but I tried it out at home and like it so much, that it will probably stay here until I get a second GUS 30oz mug, this time for work.  A side note, my cat is also named Gus, which is why I originally ordered this mug<br /><br />On my first use after washing, I filled it about 2/3 full with ice and then some soda, all evening the ice remained and before bed, I filled up with soda again and ended up leaving about half in the tumbler.  The next morning, I checked and the ice was still there and the drink was still as cold as the night before...I took a sip and the drink was not watered down and the fizz had remained....pretty good considering I didn't even put the lid on, which surely allowed a little loss of coldness from the room air.
Rating: 5 stars