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Limited Edition - Key Cache X Lei Melendres

This collaboration has now closed. Sign up to our newsletter using the form at the foot of this page to be the first to know about our next limited run.

The Key Cache is designed to enhance and complement your everyday carry, while discreetly adding functionality. 

It neatly fits onto your keyring while containing a secure compartment to store banknotes and contact details in case your keys go missing. 

For this limited edition collaboration, we teamed up with Manila-based illustrator Lei Melendres, bringing one of his “We Are Infinite” doodle characters to life on the base of the Key Cache.

Laser engraved in brass or stainless steel, this collaboration is a celebration of Lei’s sprawling creations, defined by repetition, pattern, monsters, animals, unimaginable creatures and the unknown.

Lei Melendres is a freelance illustrator and the head of Doodle Art Enthusiasts, the Philippines’ largest doodling community. His inimitable artwork has graced books, magazines, murals and galleries around the world. Lei describes his infinite doodle style as conveying the intensity of endless details and elements interacting together to form a scene of art.

Commenting on the design, Lei says, “I think of the different characters I draw in my artwork as the people we have met throughout our lives, who have influenced us physically, mentally, emotionally and spiritually."

Please note: This limited edition collaboration Key Cache is not available with a personalised inscription.


  • Dimensions: Outer: 40.50mm x 13.6mm diameter, Inner: 31mm x 10mm diameter


    Capacity: Fits GBP, EURO, USD and every other note we have tried (the maximum size we have tried is 160mm x 82mm). 


    Manufacture: CNC machined from a solid block of stainless steel and treated with a black steel oxide coating. The body features custom knurling to provide the ideal ergonomic and aesthetic finish. Hermetically sealed with a silicone washer to keep its contents dry. Designed and manufactured to aerospace standards in the UK, with all material sourced from Europe.


  • Delivery: It takes time to hand make each product to order and during busy periods we can build up a bit of a waiting list, please click here for the latest information.




Customer Reviews

Based on 22 reviews
My second Key Cache

I purchased the first on a Kickstarter promotion, and while I haven't yet found it necessary to use the bill stashed inside, it is comforting to know that emergency funds are close at hand.
The second one was sent to my granddaughter so she could have the same confidence. Both she and her mother approve.


Such a well engineered and made product. Despite it's tiny size you really can get a £20 note in !! Thankfully have never needed it yet, but then, have barely left the house in months anyway. Thank You all at Wingback, amazing workmanship

Genuine emergency cash!

Hi friends at wingback, I just wanted to let you know this quick testimony.

This morning there was an earthquake in Mexico city. As you can probably understand, we rush down from our apartment, my dog without the leash, my girlfriend grabbing the keys and phones, and me, barefoot and rushing downstairs. After all the shock was done, and we were outside with nothing on us, my girlfriend needed something to calm down, so we went for a cup of coffee to one of the next door businesses in the street.

They had cash only service, and we did not have our wallets with us, I mean I was barefoot and only a t-shirt. But we had my house keys on the Key Cache. I had used the emergency cash before, but this was the first time that it was for an actual emergency. I could have needed cash money for an emergency patch for someone injured, for something at the drugstore, to move around town, to use a pay phone if I could find one.

Thank you guys for making products that actually work, and when needed, are reliable. You can always count on me as a customer.

Best regards from Mexico

A god send for my hearing aid batteries

Discrete, but solid and comforting to hold & twist, my Key Cache has been a God send so many times in the last 9 months - I’ve worn hearing aids all my life and never found a way to make sure I have spare batteries on me. Dates can end awkwardly & silently, meetings have been totally misheard and opportunities have been surely missed. The Cache subtly holds 3-4 batteries and has been my saving grace countless times already as it sits with my keys and therefore with me at all times. The inscription (my initials) just simply adds another touch of class to such a personal and convenient edition to my EDC.


So happy I secured myself a key cache of this limited edition in black Steel! Perfectly handcrafted - this will last for Ages!