I use this insulated travel cup every morning on my commute and it really does keep coffee hot for hours. The lockable lid gives me confidence tossing it in my bag, and it hasn't leaked yet. One-handed opening is handy when I'm driving, and it fits my car cup holder and bike cage. The lid disassembles for a proper clean and goes in the dishwasher. Stainless steel feels solid. Only note: 12 fl oz is a modest size, so refill if you drink a lot.