I love this this coffee mug by REI. It is a vacumm seal 15oz mug with a coffee grind screen that can be removed. In the morning, I put two scoop of grind beans, hot water, sugar, cream and about three hours later, I am sipping the coffee because it is still too hot to drink. In the afternoon, I remove the filter screen and fill it with Frappucino. Unscrew the lid and insert a straw into one of the two opening and I am good to go. And oh yes, it also fit my bottle holder on my bike. Only draw back is the darn thing is expensive but well worth it.