From the search results, it is clear that electric toothbrush chargers are made of different materials and have different designs. Here are some details about electric toothbrush chargers:

Materials:

• Insulated ABS material
• Polyethylene (PE)
• Plastics and nylons

Design:

• Fully sealed and waterproof design
• Inductive charging base

It is worth noting that some electric toothbrushes are designed to be more eco-friendly than others. For example, some brands use compostable brush heads to reduce disposable waste. Additionally, the rechargeable batteries used in electric toothbrushes make them lighter and more convenient to use, but they also bring on a whole new facet of materials needed to keep peoples teeth clean.