GSI Outdoors Infinity Bowl Set

This bowl is made of a flexible, colorful plastic, not lexan.

Pros: Lighweight and tough, this bowl will last a long time. The dimensions are such that you can lick it clean in the backcountry. The sealable lid allows you to hike with leftovers. The lid makes a great cutting board which won't dull your knife.

Cons: Seal is not reliable enough to hold liquids like spaghetti with sauce. I've had one of these burst inside my pack which was totally miserable. It is also difficult to know if the seal is fully closed or not. Like tupperware, the bowl tends to retain a thin coat of oil after washing. This is annoying in the backcountry - your breakfast cereal will taste like last night's ramen.

For the price, not bad, check out the Nalgene PC jar as an alternative, which is tougher and has a better lid.

The Infinity Bowl Set nests together nicely and the bowls are in fun, bright colors. I'm not sure the lids are really necessary features, but they snap onto each other too. These aren't especially lightweight, but are great for car camping and shorter backpacking trips. While these can't go in the microwave, you can throw them in your dishwasher when you get home. GSI Outdoor made these with BPA-free material, so you really can't go wrong.