Russia is always known to have curious things… but when you expect a
water tap to spend water but instead “drinks” the water out of your glass,
then you can say, it’s somewhat strange. However I am not yet able to say
what causes the tap to “drink” the water but I think, there might be some…

…check on the house’s water pipes and the guy is living some floors above the ground. When someone drains the pipes to do maintenance on the pipes, suction might drag the water back into the tap once it has been opened.

But tis is is all speculation. However this it what it looks like!

Watch: