Weirdly, this reminds me of some interactions with Iraqi and Afghan police/military. We had a BUNCH of protocols to go through when handling UXO. But man, if it didn't beat all to see some Iraqi policeman just chuck UXO in the back of their pickup and drive it back for disposal.
UXO possess a very strong prey drive. If you exude confidence, they're docile and even timid. However, if a UXO senses fear they become very aggressive and volatile.
In Northern Ireland during the troubles, if a bomb was left on a bus, sometimes the driver would just lift it up and dump it somewhere then drive off (notifying police of course)
It's obviously hard to tell but the French do drink a sweet low alcohol cider (like 2-3% alcohol) during the day, particularly in summer when it is incredibly refreshing.
On the other hand, they're not huge tea drinkers.
On the other hand though they're keenly aware that the Brits love a good cuppa.
But on the other hand there is no milk in sight which is basically blasphemy to an English gentleman with a rifle to hand.
Edit: lastly, if that is tea, it looks like the kind of tea that is so weak it might cause an Englishman to build a guillotine over.
"When in Rome and all, chaps"
All in all, I conclude that the likelihood is cider.
In that situation I'd be happy with the steam off a tea bag tbh and absolutely anything drinkable being delivered like that would be like the nectar of the Gods.