No refills needed with this whopper! Offering maximum hydration and an insulated stainless steel, your water will stay ice cold this summer hour after hour. The ergonomic two tone accented handle with enhanced silicone grip makes for easy carrying. And the narrow base fits in just about any car cup holder. Includes a straw for sipping without spilling while on the move or just twist top lid to allow for open lid drinking. Just twist the lid to seal close!