The 30oz Stainless Steel Tumbler Car Cup is famous for rugged insulation, but a few simple habits keep it performing like new. After each use, rinse the 30oz Stainless Steel Tumbler Car Cup with warm water to prevent coffee oils from clinging to the electro-polished walls. Once a week, fill the 30oz Stainless Steel Tumbler Car Cup halfway with hot water, add a teaspoon of baking soda, and let it fizz for fifteen minutes; this neutralizes odors without harsh chemicals. For stubborn stains, drop two denture tablets into the 30oz Stainless Steel Tumbler Car Cup overnight, then scrub gently with a soft bottle brush. Avoid steel wool, because micro-scratches can trap flavors and compromise the 30oz Stainless Steel Tumbler Car Cup’s sleek finish. The lid and silicone seal pop apart for thorough cleaning—wash them on the top rack of the dishwasher or soak in soapy water to keep the 30oz Stainless Steel Tumbler Car Cup germ-free. After washing, store the 30oz Stainless Steel Tumbler Car Cup upside-down with the lid off so air circulates and prevents mildew. If you switch between coffee and sports drinks, freeze a vinegar-water ice cube inside the 30oz Stainless Steel Tumbler Car Cup for two hours; the slow melt sanitizes and deodorizes in one step. Finally, polish the exterior of the 30oz Stainless Steel Tumbler Car Cup with a microfiber cloth and a drop of olive oil to restore its showroom shine. Follow these steps and the 30oz Stainless Steel Tumbler Car Cup will deliver fresh flavor and flawless looks for years of daily driving.