blue effervescent fever health illness medication medicine pills sickness tablets abstract art background bubbles circles color colours cool cruise desktop drinks ecology fizz float fluid foam gas graphic illustration liquid modern moisture pink quench refreshing round scrapbooking smooth summer surface swirl texture thirst vector wallpaper water waves white aqua detergent soda soft drink ball bath blur bright bubble concept creation decoration design effervescence froth green image light magic pattern shiny soap spa washing yellow gray grey amber beer purple violet