Good day everybody!

I recently made an attempt to bike home from work...which takes 50 minutes to drive 78 Km down the highway!

I did pretty good considering, I made it 60 km in 3 hours, (first 27 were all uphill), going along the back roads. I figured the total distance would have been around 90 km.

My problem was, I hit the wall at 50K. I know I didn't plan quite right ( I had to go before I lost my nerve). I have done greater distances in the past. I had been hoping to find a store en route to refill on water, but no, I ran dry at 35km.

What I am actually wondering, is what light weight-hi energy/protein I could carry with me to sustain the energy all the way home?

Any input would be wonderful, thanks!