www.msdmanuals.com Review:

First, let me tell you what I do not like about this serum. It needs to be a pump instead of an eye dropper. I don't care how careful you are but pulling the eye dropper in and out gets messy and you waste serum getting on all sides when you screw it back on. Even though I do not like that part I still gave it a five.

This cup is fabulous! I purchased a Starbucks coffee, which I drink every morning and dumped it into this cup. After one hour it was still hot-hot. After two hours it was still very warm. After three hours it was luke warm but not near cold. Coffee wouldn't typically last me that long but I was purposefully testing it out. The lid seals tight and it's easy to grip... I do wish it was a tad bit smaller and had a slide close on top so I could double it as a soup thermos for my kids who take lunches to school... I will be looking for them to come out with that next ☺️