The Baby Jogger Liquid Holster is a self-leveling drink holder that sways with the motion of the stroller - helping to prevent spills.
You don't need one but boy you want one.
The Baby Jogger Liquid Holster clamps around the frame of the pushchair. Once the mounting bracket is attached the cup holder can be easily removed for cleaning etc.
The liquid bottle holster cannot be attached to the frame of the baby jogger city mini, gt, elite, or summit pushchairs.