The YETI Rambler 30 oz Tumbler in Firefly Yellow is built to keep up with your busiest days, whether you’re commuting, working, or enjoying the outdoors. Crafted from kitchen-grade 18/8 stainless steel with double-wall vacuum insulation, it keeps hot drinks hot and cold drinks ice-cold for hours. The durable Duracoat™ finish resists fading and peeling, while the included MagSlider™ lid adds an extra barrier to help prevent splashes (though it’s not fully leakproof). With its bold Firefly Yellow colorway and cupholder-friendly design, this 30-ounce Rambler delivers rugged YETI performance with standout style—perfect for daily hydration at the office, on the road, or on the sidelines.