Break time finally arrives and you take a big swig of coffee from your thermo bottle only to get a mouthful of metallic-tasting java. Yeck! The Boulder 2-in-1 Ceramic Lined Tumbler solves that problem. Its ceramic-lined inner wall features Puramic™ zero transfer technology to prevent any “off” taste from tainting your beverage. The massive 34-oz. capacity means you won’t be running on empty any time soon. Insulated, double-walled stainless steel construction keeps drinks delectably hot or refreshingly cold for hours. A dual-function leak-proof lid lets you sip iced drinks from the built-in flip-up straw or hot drinks from the flip-open drinking port. Handy carry strap lets you hydrate on the go.