The drink-thingy for foonf and fllo attaches easily to both sides of the seat frame in forward and rear-facing. There are two attachment options a L and a R (depending which side of the seat you are attaching to). Plus it’s crash tested and approved for use with our seats only. The drink-thingy can be removed and is dishwasher safe. Reminder: Don’t use aftermarket accessories with your car seats if they haven’t been crash tested and approved by the manufacturer.