Vibrant Refill Animation Sticker Prompts for Water Bottles

Design a set of refill animation stickers with rainbow colors in a clean vector style, no shading or gradients. Each prompt features placeholders [fill in with your unique text], focusing on high contrast, perfect for die-cut sticker formats with pure white backgrounds. The designs should depict dynamic rainbow refill effects, such as streams, splashes, arcs, pulses, waves, bursts, or flows, all rendered with bold outlines and vibrant, flat rainbow colors to ensure crisp print quality and striking visuals.