Reverse time with the Reverse Hourglass
Sink the Sands of Time with a Magic Hourglass
Mark the march of time and go against the tide with this magical inverted hourglass. In its glass receptacle, this fine hourglass moves the granules from the bottom half to the top half. Take advantage of its transparent design to set it off against your walls and other spaces. Create a visual contrast that won’t go unnoticed.
A Paradoxical Hourglass that Fascinates
Available in blue, black, red and green, this timeless hourglass stands out from the crowd. With its slender design and harmonious curves, it looks as if it has stepped straight out of a treasure cave. A real-life paradox, this hourglass will enchant your visitors and add a touch of mystery to your interior decor.
Features of the Hourglass Upside Down
- Materials : Acrylic glass
- Dimensions : 12 cm x 6,5 cm x 2,5 cm
- Duration : 10 Min
- Style : Decorative hourglass
- Scientific gift idea
Frequently Asked Questions
How does the sand go upwards?
A reverse hourglass works on buoyancy. The granules are less dense than the liquid they sit in, so when you turn it over they float up through the narrow neck instead of falling down.
How long does it take to run through?
It runs for about 10 minutes, which makes it handy as a short timer for a break or a game, as well as a decorative piece.
How big is it?
It measures 12 x 6.5 x 2.5 cm and is made of acrylic glass, so it fits easily on a desk, bedside table or shelf.
What colours are available?
You can choose blue, black, red or green granules, which stand out clearly against the transparent body.
Lab protocol What we guarantee with this order Carefully packed to arrive in one piece.


The Hourglass Decor, a timeless object for your home
Personalize your home with originality by choosing a unique decorative hourglass to decorate your interior. Contemplate the magnificent spectacle of time flowing by the trickle of sand or liquid. This scientific object will enhance the design of your room by adding a magical touch. Visit our selection of Hourglass Decor, instruments of time that you can display to add a designer touch to your decor.
























Daniel Okafor –
Bought this for my 8-year-old and he was glued to it for a good twenty minutes, then dragged his sister over to watch. He kept asking how the sand knew to go up! Had a look myself and it seems the sand is sitting in a liquid-filled chamber with tiny bubbles pushing it along, which is a clever bit of engineering. Now lives on his bedroom windowsill and gets shown to every visitor.
Margaret Hughes –
Got this for my grandson’s birthday and his little face lit up. He keeps turning it over and giggling. Lovely gift.
priya.shah –
spot on. sits on my desk at work and every colleague who walks past stops to stare at it. Hypnotic is the word, really
Graham Fletcher –
I’m a physics nerd so I couldn’t resist taking a proper look at how it works. The grains rise through the liquid in a slow, steady stream and it looks properly odd, like gravity has taken the afternoon off. Packed well, arrived quickly, and the missus has now claimed it for the living room. Brilliant.
Hannah Doyle –
Ordered from here a few times now and this is another decent one. The effect is cracking and it looks smart on the sideboard. Only thing is the flow is a touch slower than I expected, but it’s growing on me the more I watch it.
MargaretHolloway –
Bought this for my grandson Alfie’s birthday and he hasn’t put it down. He sat watching it for ages, then ran off to fetch his mum because he was convinced it was magic. Spot on.
Daniel Pritchard –
brilliant little thing. You turn it over and the sand climbs up through the glass instead of dropping, which looks completely daft in the best way and had me staring at it like a child. It’s sitting on my desk now and every visitor ends up picking it up for a go. Chuffed with it.