Bottle cap challenge - cap of the Challenge bottle is a popular 2019 flashmob. Many celebrities have tried this challenge is now your turn! The goal of the bottle cap challenge is to open the bottle cap with your foot. Celebrities have shown their bottle cap challenge skills, can you do the same? bottle cap challenge,foot challenge,html5 puzzle,2D game,puzzle game,challenge,game,online game,single player,flashmob,fun,easy to play,foot powered,open bottle cap,mobile game,puzzle challenge