Here's a quick look at two very affordable iPhone 5c cases from Amzer: Pudding TPU Case ($8, aka TPU) and SlimGrip Hybrid Case ($4, aka Hybrid). The former is a take on thermoplastic cases, similar in some ways to Incipio's NGP. Instead of a fully matte finish though, it's glossy on the sides and matte on the back. Eight colors are available, each of which skips button protection, something that's generally present on TPU cases. The openings along…