Easy things to eat in front of other people?

I have a really hard time eating and drinking in front of other people; my family, my friends, even strangers. On a normal school day I don't eat anything from 6.30 in the morning when I have breakfast, to 3 o'clock in the afternoon when I get home.

I found out, that if I put a straw in my water bottle I'm able to drink water in front of other people, so I was wondering if any of you on here had an idea to something that could be easier to eat?
Easy things to eat in front of other people?
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