Another strange thing... it composts, it grows...

[alldigging]

GARDEN TOWER: Composting + 50 Plants = Fresh Food Anywhere. by Garden Tower Project — Kickstarter

I've seen blue food barrels turned into planters like this - but don't think they've ever had a compost bit down the middle.

[SarzWix]

Looks like a plastic, miniturised version of a key-hole garden? Keyhole Gardens | How to make a Keyhole Garden | Teaching resources about African Keyhole Gardens | Kitchen Gardens

[Bren In Pots]

It reminds me of a strawberry tub I was once given.



Apollo Strawberry Tub: Amazon.co.uk:

[alldigging]

Yup!

Or more like Vertical barrel planter | GreenFuse Photos: Garden, farm & food photography

[Tripmeup]

To me, just like a strawberry tower...