Heated Eye Wands: which is best?

Which is the best eyelid wand and is it worth the money?

There are no studies yet to compare any of them to my knowledge. 

I suspect the one that provides heat and gentle vibration (ideally vertically in the pathway of the meibomian glands but with an option for circular and horizontally since we do not know which is better...) is best.

1. I have not tried Peepclub's one but it looks interesting. In the UK. 

https://peepclub.com/products/heated-eye-wand

2. I like nulids but do not like that it does not provide heat and the light is uncomfortable on the first version I tried. I do not own either. 

https://nulids.com/

3. I like Arbonne's Ultrasound wand in theory but the company stopped producing it and there is a concern that the ultraound placed over the upper eyelid as it sits on the eyeball could cause a cataract if used long term: there are no studies long term to prove it's safety but I think they were on to something!

https://www.arbonne.com/us/en

Arbonne Intelligence Genius Ultra Wand. Anti-Aging Tool.

This is a hot industry and I expect many more versions to come out to help with the dry eye epidemic. 

SLC