Placing icons in containers offers a framework that ensures visual consistency across your design. The containers, although invisible to users, act like an invisible grid, making it easier to align icons perfectly with other interface elements. Adding a bit of padding within the container gives each icon room to "breathe," ensuring that they don't look cramped or overwhelm users.

When multiple icons are placed near each other, it's crucial to use the same-sized containers for each. This standardization aids in maintaining a harmonious layout, making it easier for users to scan and understand the interface. Even if the icons themselves differ in size or complexity, uniform containers create a level of consistency that enhances usability.