It's light as can be doesn't burn your lips and helps keep your drink/food warm or cold. I have used mine for all kinds of stuff. I even take it to work as my tea/coffee cup.
It tends to be slightly porous. can discolor due to coffee or tea. I wish it had the same finish as the single wall cup my wife has.
Oli-cup / Glacier cup for $10. Keeps liquids warmer longer, it doesn't stain, and you can buy 5 for the price of 1 of these cups. I can deal with the extra half ounce of weight for $40 !!! You may not be the coolest kid on the block without titanium... but you will have gas money home.
