When it comes to choosing between a primer tube and a bottle, it's not so much about the packaging but rather the formula inside. However, the packaging can play a role in the application, preservation, and portability of the product.

1. Application: Tubes often come with a narrow opening, allowing for controlled dispensing of the product. This can be beneficial if the primer has a thicker consistency. Bottles, on the other hand, may come with a pump or dropper, which can be more convenient and hygienic, especially for liquid or serum-like primers.

2. Preservation: Both tubes and bottles can effectively preserve the product if they are properly sealed. However, tubes might have a slight edge as they limit the product's exposure to air each time it's used, which can help to maintain the potency of active ingredients.

3. Portability: Tubes are generally more travel-friendly due to their lightweight and durable nature. Bottles, especially glass ones, can be heavier and more fragile.

4. Sustainability: If sustainability is a concern for you, consider the material of the packaging. Both tubes and bottles can be made from recyclable materials, but it's always good to check the brand's sustainability practices.

In conclusion, the choice between a primer tube and bottle largely depends on your personal preferences and lifestyle. Always remember that the most important aspect is the formula and how it works with your skin type.