Design a portable, solar-powered vaccine refrigerator called "VAX FRIDGE", made for use in remote field conditions. Shape: A light beige rectangular unit with rounded edges. Handle: A dark gray, rigid plastic carry handle mounted independently above the lid. Lid: The entire top surface is a flat, integrated solar panel (dark blue grid texture). Front: LCD screen displays “4.0°C”; below it, the label “VAX FRIDGE”. Size: Compact, approx. 30–40cm tall, hand-carryable. Material: Matte plastic, clean industrial style. Export as .glb (gltf) for web or app use.