Have you checked out "Beyond Your Backdoor"? It's a nature store and a new division of Lesser Jewellers.
These "preform" geocache tubes are the early stage of a 2 litre soda bottle. They are virtually indestructible, dishwasher safe, and they are clear so you can see everything inside. A cap is included, and each one comes with two Rite in the Rain log sheets
Each preform measures approx. 14cm tall, and each holds about 60 ml. The internal diameter is 21.6mm.
Remember to follow Geocaching.com regulations and respect private property when hiding caches!