Mighty Mug マイティーマグソロクリーム #1903

Q: Is it microwave safe?

No, it is not microwave safe. Only dishwasher safe.

Q: Is the plastic bpa free And is that in documentation

Yes item is BPA free. Item is labeled itself and information is available in item description on website.

Q: How well this does retain heat? Can it keep a drink hot for even just an hour or two? Because it doesn't really look like it.

I would say the drink stays quite warm for about an hour or so. Two hours is a bit of a stretch. Your beverage isn't going to be HOT for more than about 45 minutes, warm through about an hour or 70 minutes...after that you're getting room temperature.