I mix the first consistency for outlining cookies and then outline all of the cookies. Add more water to your icing for flooding after that. I've discovered that ziplock sandwich bags, with a Wilton coupler & tip works pretty good for outlining. Then I squeeze the rest of the icing into a squeeze bottle, add more water & shake to mix for the flooding consistency. No need for Wilton tips on the squeeze bottles. The squeeze bottle tips work pretty good. If you anticipate needing more solid icing for decorating after flooding, retain some for that use.