pyroskater 
Amazon has 16oz. Zojirushi Stainless Steel Thermos Mug (Black) on sale for $18.75. Shipping is free with Prime or if you spend $25 or more.
- Stainless steel vacuum insulation keeps beverages hot or cold for hours
- Durable and sanitary 18/8 stainless steel interior
- Slick Steel finish; Heat Retention: 187°F @ 1 hr. / 154°F @ 6 hrs.
- Wide mouth opening
- Compact design takes up minimal space while maximizing capacity
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