Popular Mechanics Reviews Editor Tom Price had a hard time letting go of his trusted college backpack, which he relied on for years, until he tested out Yeti’s Ranchero Daypack. Now he commutes to the office every day with it. But Yeti can be pricey, so when it goes on sale for Amazon Prime Day, it’s worth noting. Yeti sales can be hard to come by, but we found several good discounts up to 30 percent off during Prime Day. The downside is that the sale doesn’t apply to all colors.