Freemax Fireluke 3 With Three Steel Balls For Anti-leaking

[Freemaxtech]

Fireluke 3 by Freemax is designed with the combination of resin and metal, together with stylish Honeycomb glass, which makes it so unique among all the other tanks. Compared to Fireluke 2, the Fireluke 3 is designed with three steel balls into the top cap to increase friction for anti-leaking.

So what do you think of this design for Fireluke 3? Any suggestion to improve it?

 

[iqon]

So what do you think of this design for Fireluke 3? Any suggestion to improve it?

Add more spare seals

 

[OzoreXS]

A slight angled cut on the top cap, just in the part where the refill port is, it would allow to place better the bigger liquid bottles

Or even better, not having a slide cap but a rotating one that reveal the filling port (Zenith Pro...).