TLDR: This is like that ring thing that revolver lovers use, but for gel blasters, easy to use, holds lots of orbeez / gellets / water gel beads etc, and tip works like a handy funnel

The review:

It's best use is to have gels ready to go. The tip is sized just right for gel balls to move at fast rate but small enough to stop it easily, often holding on the lip of the hopper or door of the magazin and then tipping up.

It can hold lots of gel balls. Also strain out the gel balls as if there is water most of the time the gels block, but it can fill the mag or hopper

It's not good for day or longer storage, as its not airtight seal (but water, juice, or soda gallon / liter or 2 can be capped air tight and used for that) and also the tip can easy be knocked off if one is moving too fast or its shaken / dropped. And if you are in a dry climate, might have to rehydrate the gel balls.

They even have high speed dudes with mil vests instead of grenades or flashbang, they load up on speed loaders. Perfect for the SAW team / member