so, when throwing BP, i have a bucket full of balls. i dump them out in front of the L screen, pick up 3-4 balls, throw them, bend over, pick up a few more etc. while i have a kid on "bucket duty" filling the bucket back up with the hit balls to bring back. A couple of teams when we are visiting have a tripod with a crate on it that they refill so i dont have to bend over every 3-4 pitches. I cant seem to find them online...could probably have the kids in our welding shop class build one, but...what are these called and where do i get one!?!? haha. thanks!