Isabella Marie Swan ✝ "Juliet"

She comes downstairs, fetches a grocery bag, goes outside, and opens the bag. (She doesn't trust him perfectly yet - but she thinks it would offend anyone's sense of anticlimax at this point to kill her with a trapped bag.) She unzips it, peers inside, verifies that it contains labeled jars of blood, and transfers the jars to the bag so he can keep his backpack. She runs them into the kitchen, reorganizes the vegetable crisper, and puts the bag in next to the leftover turkey. She puts a sticky note on it that says "ASSORTED ANIMAL BLOOD - SHERLOCK'S FRIDGE BROKE - YES DAD I AM BEING SAFE THANKS" and then grabs her messenger bag and heads out to start the evening.