Luis, do yourself a favor and buy one of these. You WILL NOT be disappointed and it will last the rest of your life. It is basically a burly dry backpack:
http://www.nrsweb.com/shop/bills_bag.asp

If you are just looking for a non-backpack style, I highly suggest the SealLine drybags. Even small drybags have an ability to hide items so a clear one is the way to go IMO.
http://cascadedesigns.com/sealline/dry-bags/ecosee-bag/product