A simple glowing lantern made from a bracket holding a "Breadboard friendly Neopixel" (colour-changing LED http://www.adafruit.com/products/1312) inside a milk bottle, which is a common size in the UK (38 mm neck).

There are holes to suspend it - I intend to use these in a early-years children's play space. The grip assumes standard header has been soldered in place, making it an easy, modular system.

Both the translucent and white bottles work well - I can't decide which I prefer.

This is a one-piece print, but the lantern needs the following:

• 500ml Milk plastic bottles (38mm opening)
• Neopixels with headers http://www.adafruit.com/products/1312
• Cabling to drive and connect each unit to the next (standard alarm system 6-core wire works well and is cheap)
• Strong to hand them (don't use the power cabling)
• Arduino or equivalent to drive them (library free at Adafruit)
• Blackout - the darker the room the better. In full daylight you see nothing.

It should be obvious, but theses are not weatherproof.