Alibaba-backed online food and grocery platform BigBasket has acquired Pune-based micro-delivery startup RainCan. RainCan will get rebranded to BBdaily as part of the acquisition. Founded in 2015 by IIT-Bombay alumni Munendra Singh and Abhijeet Kumar, RainCan is a subscription-based service provider for morning and breakfast essentials such as milk, bread, eggs, fruits and vegetables.