The best travel stroller – now for two. When it comes to the top travel strollers, there are a few things to bear in mind. Firstly, it needs to be compact for travel, but sturdy enough to withstand the weight of a child. Secondly, it needs to be easy to use. What if we told you that the Kooper RS2 has all that, but then times it by two, allowing you to transport two children at once, side-by-side?