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Title: Spillproof - yes. Simple - no
Review: I bought 2 of these mugs for my husband as gifts. He has only ever opened one of them. I asked him about it and these were his issues- 1.Doesn't hold enough coffee. I thought it was a 16 oz like the metal version. Since I don't drink coffee, I didn't realize that this was too small for the morning at the office. 2. You have to retrain yourself to drink from it. Like mice in a lab, you have to push a button every time you want a drink. He just doesn't want to take the time to think "push the button first" I know it would become automatic after using it awhile, but he drives so much in the morning, he doesn't want his mind distracted. He had no thermal issues and no leaking, but he just didn't want to take the time to get use to it.The product did what it claims, it just didn't work out in our house.
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