Joovy Ergo Caboose Stroller this stroller is top of the line when it comes to the Caboose! The Ergo Caboose is the same patented Stand-On Tandem but features a revolutionary stroller design and ergonomically engineered front seat. This stroller has a new multi-functional sun canopy and swing away front tray and 2 removable cup holders. The Ergo Caboose has sealed ball-bearing wheels; pneumatic rear wheels with a tire pump.