She won't take formula, please give advice! ❤

Any advice for a baby that won't take formula? Going on a 10 day trip without kids and since my baby girl is such a grazer I don't pump enough to have a freezer stash. I've got three months to get her willing to take formula. Tried three brands now and various ways to give it to her and she's taken .25 oz so far after over a week of trying. Any other ideas? Thanks in advance, I'm going crazy trying to get her to take formula! Had to exclusively pump with her older brother and had no problems switching I'm at 6 months (except for finding the right brand)! She'll be 7 months on the 10th.