No refills needed with this whopper! Offering maximum hydration, an insulated stainless steel, and baked in design; your water will stay cute and ice-cold this summer hour after hour. The sleek new design with narrow base fits in just about any car cup holder and the top lid eliminates excess leakage! Includes a thick plastic straw for sipping while on the move. Dimensions inside individual cardboard box 6*4.3*11.8 inches