Table Tennis Ball Pickup Devices
When MDTTC first opened 22 years ago we didn't have any ball pickup devices. Correction - we had our hands. Two of them, in fact, and that's how we picked balls up our first couple of years. What were we thinking???
Then we got the Butterfly ball amigos, and life became much better. They are great for picking balls up quickly, which is big when you are coaching or training long hours. We have seven full-time coaches at MDTTC, and usually have two nets per court, so that's a lot of nets. Most of the major companies sell some sort of ball pickup net or similar device. (We have ball pickup nets, table tennis nets on each table, and nets to catch balls on the robot. We're practically a net club. Wonder what our net worth is?)
There are now a number of ball pickup devices on the market. Most come in three types: nets to scoop them up (probably the fastest); tubes to pick them up one at a time (not as fast, but easier to get balls in tricky spots like in corners); and the "ping-pong buddy," which grabs the balls a bunch at a time. (The kids love these.) There's a nice review of all three types at the Breaking 2000 page, which includes pictures. It also has video of three ball-picking up robots. Here's another (1:30).
Back in the 1990s or so there was sort of a ball pickup wars, where Newgy introduced their ball pickup tubes. There were a number of ads in USATT Magazine for these tubes and ads by other companies for net pickup devices. Personally, I've been using the nets for about twenty years, and swear by them. During training sessions I often have ball pickup contests with students to see who can pick up the most.