I bought some sushi (california rolls) at Trader Joes and I want to eat it for lunch tomorrow. My problem is that I start classes tomorrow and I have to leave the house at 8:30 am. The weather is pretty hot around here and I am wondering if they will still be ok to eat after being out of refrigeration for 3-4 hours. What if I stick them in the freezer tonight? Will that make them stay fresh longer? Or should I just take something else for lunch?