The large-scale deployment of Solar Bottle Bulbs

I've come across multiple stories from the Philippines (see [1], [2]), on the many public/private partnerships designed to promote the adoption of solar bottle bulbs. The catalyst appears to be an organization called A Litter of Light -- a project spearheaded by local entrepreneur Ilac Diaz:

Isang Litrong Liwanag (A Liter of Light), is a sustainable lighting project which aims to bring the eco-friendly Solar Bottle Bulb to disprivileged communities nationwide. Designed and developed by students from the Massachusetts Institute of Technology (MIT), the Solar Bottle Bulb is based on the principles of Appropriate Technologies – a concept that provides simple and easily replicable technologies that address basic needs in developing communities.

 
For instructions on how to make a solar bottle bulb, see here.