Did you "just happen to have a bottle of Stony with you" @Tom Kellie?
After passing through Kenya immigration into the pre-flight waiting area, I walked along the duty-free shops.
When I noticed that one shop had a small glass-fronted refrigerated display case with chilled drinks, I entered the shop.
They sold Stoney! I bought a bottle, drinking outside of the gate area, as there's a second security screening, thus no liquid is allowed to be taken in.
The empty bottle was stuck in a side pocket of my camera bag, finally coming out at home, back in Beijing.
Seeing it is a happy reminder of ‘things Kenyan’, bringing a smile.
I have taught a group of Kenyan botany graduate students, to whom I showed the Stoney bottle as a reminder of hime.