Canless air dusters are better than canned air dusters for cleaning computers because they do not harm the environment like cans do, you do not need to prove your age to purchase them, and you only need to buy the system once as it can be reused indefinitely unlike cans of compressed air that must be continuously replaced.

1. Computer Air Duster
https://www.canlessair.com/computer-duster/
There are two types of computer air duster. One is
canned and other is canless. Canless is better than
canned air, because it does not harm the environment
and no need to prove age to buy it. Another important
advantage is you buy it once and you have it forever.
Canless Air System