When it comes to travelling with kids, you need to have a trash can in your car or else the garbage just ends up on the floor. You can buy a specific car trash bag, or you can use a cereal container (with a bag inside) as your trash can. Getting crumbs and grime out of the bottom of a cup holder seems an impossible task. Solve this problem by sticking cupcake liners in all of the cup holders. That way, when something gets spilled or crumbled in the cup holder, you just remove the cupcake liner and put a new one in. It’s a good idea to keep a…