The biggest untapped opportunity online: the same-day delivery of merchandise, specifically fresh food and consumables. When looking at the list of players participating in same-day delivery, investors should be able to appreciate the sales and profit potential. There are companies well-established in their own fields such as Walmart, Google, and Amazon branching out to the same-day delivery of fresh food. Then there are new companies that have carved out unique niches early on in the expanding industry, including Instacart and Blue Apron. Brian Sozzi interviews the Founder & CEO of Blue Apron, and came away with a few takeaways on same-day delivery services that Walmart and Amazon are unlikely to share with folks.