If you need to ever remove cups, you may want to get a cup remover. You can also get heavy 1 inch copper tube, cut 3 inch slits along the bottom, and then flare the slits out. A finishing touch would be a copper end cap brazed onto the top where you can take a hammer or mallot.

I made my own threaded rod press. 1/2 inch threaded stock or thicker. You'll need about a foot long piece. Buy about 6 - 8 large fender washers and two nuts to thread on. The fender washers should be of sufficient diameter to exceed the cup diameter. I use 3 or 4 wide champagne cork (I stock a bunch of them because I build custom fishing rods and use that cork for grip material) and drill on the middles and sand down the outside so they just barely slide out the cups on a standard 1 1/8 inch headset. I slide this onto the mid-section of the threaded rod to help keep the press centered in the head tube.

Like FB mentions above, I do one cup at a time.

You may also need a crown race setter. I've used a 1 1/2 inch sched 80 PVC pipe section to bang it in. But a shop grade metal tube with the correct crown race size is the preferred tool.