Crowfly. Easy as 1-2-3.
1. Your Instagram followers see a photo of that amazing thing you're selling, and they just _need_ to buy it. So they go to your profile link, and...
2. ...hit your landing page, where you've added all your Instagram photos featuring products. (You left the vacation pics hidden. Smart move. Nice tan, though.)
3. They tap the photo they saw, and end up right on the product page. Boom. No searching, no hamburger menus, no accidental taps. They're right where they wanted to be. It's that easy.