Come and see our amazing products. Before first use, washing shower bag with soda water. Put brown color side up to absorb the sunshine. The temperature of water can change from 15.5 degrees to 40.5 degrees when heating three hours. 50 degrees is the maximum of water. Can't drink the water, when unused pour the water out. Custom Logo Available. Price for over 330 pcs is for sea shipment Pls confirm with us about the packing info, stock color and exact production time before placing your order.