These "preform" geocache tubes are the early stage of a 2 liter soda bottle. They are virtually indestructable, dishwasher safe, and they are clear so you can see everything inside. (All preforms have a very slight greyish tint) Caps are included.
Each preform measures approx. 5.75 inches (15cm) tall, and each holds about 2 ounces (60 ml.)