In answer to your question, Yes, I drilled holes in the plastic tubs I used for planting bulbils in previously. Plus, because the tubs were rather tall, I cut a few inches off the top. I am sure you could use something much smaller – I just had some old tubs lying around and it was a good way to recycle them. Whatever you use, good drainage is important. Too much water and they can rot (as mine did last year after all the heavy rain & cold spring weather we had). Most sources will tell you they need constant moisture, but I have not found that to be the case. I kind of think of it like radishes or raspberries – lots of water, you might get bigger bulbs or fruit, but they won’t be as flavorful. Not that you want to stress the plants – you just want to try to walk that balance. Good drainage will help in that regard. I find it’s a little more critical to stay on top of the water when you grow things in pots. In the open ground, they seem to be able to find their own way a little easier if they aren’t strangled by weeds in the process!

Best of luck to you!