Ultra-realistic 16:9 YouTube thumbnail showing a giant industrial machine pouring thick red, blue and white toothpaste into a steel container. Make the toothpaste glossy, vibrant and extremely detailed, with dramatic lighting and high contrast. Show close-up liquid toothpaste flowing like shiny paint. Add a bold yellow arrow pointing toward the mixture. Background: futuristic toothpaste factory with pipes and stainless-steel machines, sharp and cinematic.
