Preheat oven to 300°F (150°C). In large bowl, combine Shreddies, popcorn, vegetable straw snacks and pretzels. Stir together melted butter and Worcestershire sauce; drizzle over cereal mix. Sprinkle with ranch dip seasoning. Toss until well coated.
Spread mixture evenly onto 2 large rimmed baking sheets. Bake for 20 to 25 minutes, stirring halfway through or until golden brown and crisp.
Remove from oven and let cool completely. Store in airtight container for up to 1 week.
Substitute ranch mix with nacho seasoning for ranch dip seasoning pack if desired.