Are These the Worst E Liquid Flavours We Ever Made? Vaped With Partial Flavor Ban, Trump Splits the Difference on Vaping The New York Times Approximately 16,000 unique flavours have been identified for vapes, many of which appeal to potential users. Some flavours increase the toxicity of vape emissions and can generate compounds that are known to Vape Juice Brands to Avoid: Harmful Ingredients & Worst Flavours