I like the Pyrex-bottomed ones with the plastic latching lids and the rubber gasket. I also had one big plastic-bottomed one with the same latching features that worked well for years, including several kayaking trips.

The only problem that I've noticed is that the gasket can sometimes work itself loose. The big plastic one I had ejected the gasket from the lid in what is probably the world's worst dishwasher several years ago, and landed on the exposed heating element in the dishwasher's main chamber. It set of the fire alarms, burnt halfway through on one side, and all the way on the other. I continued to use it very carefully for several years, even with the break in the gasket, until I tossed it when moving to Europe.

Now I remove the gaskets and wash them by hand (now that I have a dishwasher again!)