Leaving baby with Noni!!

Koda
I'm leaving my EBF baby with her grandmother (Noni) for about an hour tomorrow to go on a date with my partner. She's almost 4 months, and despite our countless efforts, she will not take any kind of bottle. We have tried absolutely everything. It's not just that she won't drink, they make her cry. 
I have 5 ounces of milk pumped and ready, and about a million different kinds of bottles for Noni to try. What can I do the day of to help make things go more smoothly, of course other than feeding her a ton right before leaving?
P.S: She isn't on solids yet but will be the day she turns 4 months. Obviously I don't want Noni to get to have all the fun and be the one to start her on solids.