Regular viewers will know Professor Martyn Poliakoff has an obsession with plastic bottles.
Here's just some of the collection from his office at The University of Nottingham.
We first explained the bottle collection - which comes from countless countries around the world - back in 2008 in this Test Tube video.
This week the bottle obsession reared its head again, in this video from our trip to Brazil.
Coincidentally, also this week, I gave The Prof a gift from my recent holiday to Mount Everest.
It was a framed print of this photo, take from the Kala Patthar viewpoint - perhaps the best view of Everest in the Himalayas.
The picture now resides in his office, fighting for attention among the many other bottles!!!
PS: I also brought The Prof a Nepalese bottle for the shelf... But I liked the photo better. Everest is the peak in the middle, below the sun. The peak to the right is Nuptse in the foreground.