Authors have long written about a future in which meals are replaced by pills, powders, and drinks. For example, Willy Wonka’s bubble gum served up a three course meal.

Now Soylent, a food startup that created a meal replacement drink, is making one of its biggest pushes yet to get its niche product into the hands and stomachs of mainstream consumers. On Monday, its drinks will be available at 7-Eleven stores, according to Soylent.

Soylent, originally introduced through a crowdfunding campaign in…