The Delta Insul-Mug is a lightweight thermally efficient camping or daily commuting mug that uses a Protex(TM) hex pattern base for heat dispersion and weight reduction. The non-absorbing ThermoSkin insulating sleeve offers heat retention and the snug-fitting self-draining lid allows drip-free sipping. Learn more about camping cooking with Delta HERE Dishwasher Safe Features Protex(TM) hex pattern base disperses heat BPA-free Thermoskin non-absorbing insulation sleeve Odor and stain resistant Measurement increments on the inside Cool-to-the-touch-rim Tech Specs Best Use: Camping, Backpacking, Overland, Hot Chocolate Material(s): Mug: BPA Free Food-grade glass-reinforced polypropylene / Sleeve: Polyurethane Special: Dishwasher and Microwave Safe One Size Depth: 4.25 in / 11 cm Diameter: 3.75 in / 9.5 cm Volume: 16 oz / 473 mL Weight: 4.4 oz / 125 g