The Boulder is perfect for those of us who need an extra-large travel bottle for both hot and cold drinks! It's a 2 in1 insulated, double-walled stainless steel travel companion with a dual-functioning leak-proof lid - featuring a built-in flip up straw for cold drinks, and a flip-open hot sip lid for coffee or tea. Combine all that with a Puramic finish and easy carry strap for the perfect take on the go bottle. Features : - Ceramic Inner Coating, preventing Metal Taste and keeping drinks clean and fresh - Premium stainless steel with a comfortable silicone handle - Dual-Function Lid: Flip-top for hot beverages and a pop-up straw for cold ones - Leak and Spill-Proof - Double-wall, vacuum insulation, keeps your drinks at the perfect temperature for hours -Comfortable Carry Handle