A stickybottle, put simply, is the knackered cyclist’s best friend.
As a rider is being dropped from a group, the team manager or support worker in a following car holds a bottle out the window to hand it up.
As the handover is taking place, the rider grabs the bottle tight, as does whoever is handing it up, enabling the rider get a good tow and push from momentum of the car.
It’s known as a stickybottle because it appears neither the rider nor the person handing it up is able to take their hand off the bottle; it looks stuck to their hands.
But please don’t try this at home. We’ve been slyly cheating this way all our lives; it takes a while to perfect.