A handy travel kit made of sturdy plastics.
A selection of 6 guaranteed leakproof, durable bottles some with independent screw caps, some with handy dispensing caps and 2 storage jars. The storage jars are not recommended for liquid storage (see below).
At Nalgene they have very high standards when it comes to calling a container leakproof. They fill up the container and then pressurize it. If it does not leak they consider it to pass the test and be worthy of being called leakproof. They test the jars by filling them with water and then turning them upside down. If no water comes out they consider the jar to pass the test. So jars will hold liquid but they are not held to as high a standard as the bottles. The jars may be a better choice for thicker liquids such as lotions or gels.