I am unimpressed by this product. There is no guide as to the recommended orientation of the clips (they can be rotated in a half-circle so that they point either way) and I have yet to find the arrangement which gives me any great confidence as to the firmness and stability of the cup holder. My advice is to save £11.49 and use a small folding table or a spare plant pot upturned.
support_agent A note from the team
I'm sorry you've had such difficulties with the cup holder. We'll be in touch shortly to put things right for you.