Reddit reviews Ballsak Pro - Silver/Black - Clip-on Cue Ball Case, Cue Ball Bag for Attaching Cue Balls, Pool Balls, Billiard Balls, Training Balls to Your Cue Stick Bag Extra Strong Strap Design!
We found 2 Reddit comments about Ballsak Pro - Silver/Black - Clip-on Cue Ball Case, Cue Ball Bag for Attaching Cue Balls, Pool Balls, Billiard Balls, Training Balls to Your Cue Stick Bag Extra Strong Strap Design!. Here are the top ones, ranked by their Reddit score.
*NEW COLOR* AND EXTRA-STRONG STRAP DESIGNZippable closureFits any regulation 2 1/4" (57mm) billiard ballDurable EVA shell with soft interior liningAnodized aluminum carabiner
Looks cool. I was looking around for a similar solution as well and found a couple below. Yours looks great though!
I had jb cases add the ballholder in my lid. Also there is one for sale on Amazon as well.
How about a case? I have a JB Rugged case and I haven't found one in the world so far that I like better. You can pick one out that they have in stock, or design your own. They're the bomb.
https://jbcases.com/cases-for-sale-instock/rugged-cases.html?size=49
Cues are so subjective that it would be best to have him pick one out than to surprise him with one. Also, if he hasn't been playing very long, he should probably wait a while before getting a new cue so he can hit with others' cues and get a feel for what he likes and doesn't like.
Edit - some other ideas:
Last4Ever Tip Tool
Aramith Super Pro cue ball
Aramith Measle cue ball
BallSak cue ball case