The Go Caddy Tumbler is constructed with double-wall insulated stainless steel that keeps drinks hot for 24 hours and hot for 8. Easily sip through the BPA-free lid and travel anywhere with the cupholder friendly base. Choose from three different compatible interchangeable rechargeable bases. The bluetooth speaker base features 8 hours battery life, LED lights, push-button controls and built-in microphone for two-way calling. The power bank base includes two USB charging ports and the light base has different light levels including flashes with a 10’ radius. Use the rubber coaster attachment when the base is not in use.