I beg for help with a prize winning game on my local radio.

There's a local radio in my town that make these games where you have to figure out what the secret sound is and the prize is a lil bit of money. I've been trying to figure out what the hell this is and I just don't know. It's supposed to be a simple sound that you make from doing everyday stuff, so nothing outdoors. For example last week was "changing the light bulb", and the week before that was "opening a pizza box" , "combing hair". They make that sound in front of the mic Here's the sound - https://vocaroo.com/i/s142qHVUsJGM It's been going on for a week now, nobody got it, so they said it has something to do with FOOD. Its not opening chocolate, peanuts or cutting something with a knife. What the hell can this sht be ? If you help me and I win, I can gift you skins, rp or whatever you want. But help please!
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