The Thermos brand SIPP line is fantastic, available with handle or without. Bought my pair at Target, some are in stainless, others are purple. I ended up leaving off the sealing disc and plastic nut that holds it on to simplify daily cleaning, but with that disc it seals and makes it spill-proof and holds the heat for many hours. Worth the money, and the inner stem has a tea bag hook as well. It rocks.
http://www.amazon.com/Thermos-16-Ou...55911&sr=8-2&keywords=thermos+sipp+travel+mug
http://www.amazon.com/Thermos-16-Ou...55911&sr=8-2&keywords=thermos+sipp+travel+mug
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