MJR Tumblers Single Barrel Rock Tumbler With Grit Media Kit - Polishing Tool For Adults And Kids Rock Polisher Machine With Grit & Plastic Pellets For Polishing Stones, 30 lb

The MJR Tumblers 30 LB Rock Tumbler has been awarded Best High End and Most Versatile Run with 19 different barrel combinations. While it has not been tested for polishing bottles, the inner dimensions of the roller container is about 6 inches on the bottom and can potentially hold rocks the size of a baseball if Consistent in size. The noise level is quite loud and can be heard by close neighbors, so it's best to keep it in a garage or away from other homes. However, it should be noted that one customer had some issues with the tumbler leaking around the top bearing and breaking down twice.