Give the gift of always-hot coffee with this Ember mug on sale

*Save $30: *Ring in December with endless hot cups of coffee and tea. The Ember Mug 2 is on sale for just $99.99 at Best Buy, for a 23% markdown of its usual list price as of Dec. 1.

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It's December, which means three things: it's cold, it's gift-giving season, and you are hurtling toward the...