It's a simple diffuser for the inexpensive Osark Trail flashlight from Walmart. I wanted to make something that would light up an entire tent and this fits the bill. I also wanted it to match the namesake from the UK.

Should be printed in vase mode. then just cut the bottom off to allow placement over the end of the flashlight. 

It was designed to fit over a 29mm diameter. If you need it for another size just scale it appropriately. 

After a suggestion from my wife, who has way more wisdom than I, added a dull tipped version that wasn't so “Pocky.” For the kids safety of course.