Recommendation for new office bag

I'm in the need for a new office bag / laptop bag / travel bag.

The other day, as I was leaving from the office, I had about 30 instant hot chocolate packets in the bag, and it started to rain. Somehow, over time, the bag has lost its resistance to water. And, as you can expect, when you take about 30 packets of instant hot chocolate from the pantry, you're going to wind up with chocolate soup - given the lack of water resistance.

Thanks in advance.

Author: PinheadtheCenobite