I made this for two reasons:

1. My father needed a specific sized planter box for some outdoor hanging walls
2. For Science!  I wanted to see how long they would last in the Texas weather. (Maker Geeks PLA Dark Blue) 

Original object was the same exterior size as this one, but with only 3.4mm walls and a 2.6 mm bottom, 5mm holes were evenly spread out but fewer.  These things lasted almost 5 years.  I was amazed, though they looked ROUGH.

I made this model as an upgrade to the original.  Thicker walls, more drain holes, reinforced shaping in the corners.  I am curious to see if these will last longer.