Not if you declare the muesli bar

I took 22 liters of beer with me last year and was sent on my way at customs because the amount of duty owed was too small to justify processing it. It's just a few cents/liter.
Just be extra careful with wrapping the bottles. I bring beer on a regular basis and definitely experienced the occasional spill. Avoid flip top bottles - those have a nasty tendency to open by themselves while traveling by air