This Bike Bottle Ring Adaptor Allows Normal Disposable/Recyclable Bottles And Cans To Be Carried In A Normal "Wire" Bike Bottle Cage. We Have All Tried It And They Normally Fall Out As The Standard Bike Holders Are For 75Mm Bottles. This Clever Little Ring Reduced The Size Down To 67Mm And Secuures The Smaller Bottles Or Drink Cans As Can Be Seen In The Pictures. If You Want To Go Back To Using A Standard 75Mm Bottle Just Swing The Ring Upwards And Out Of The Way, Convert Back By Swinging It Back Until It Locks.
