The choice of the best travel adapter depends on various factors, such as the countries you plan to visit, the number of devices you want to connect, and personal preferences. However, there are some popular travel adapters that are considered reliable and versatile:

1. Universal travel adapter: A universal travel adapter is designed to be compatible with different types of outlets worldwide. These adapters often have interchangeable pins or sliding systems that allow you to select the correct plug configuration for the specific country. They offer flexibility and are convenient for travelers going to multiple countries.

2. Travel adapter set: A travel adapter set includes multiple adapters for specific regions or countries. These sets often contain the most common types of plugs and are handy if you are traveling to a specific region where a particular type of plug is widely used.

3. USB travel adapter: A USB travel adapter has built-in USB ports, in addition to the power outlets, allowing you to connect your devices directly as well as charge USB devices. This can be useful if you want to charge multiple devices at the same time.

When choosing the best travel adapter, it is important to check whether it is compatible with the outlets in the countries you visit. Additionally, it is helpful to read user reviews and ratings to assess the reliability and durability of the travel adapter.