One of the major problems with antkeeping is a lot of the supplies need to be bought online. Test tubes are arguably the most basic and important part of starting a colony but places don't sell them.
Where can you go to buy test tubes?
Doing my own searching:
Hobby lobby carries 'science kit' things, these cost $3 and have 2 test tubes each but they're smaller than I think would be good.
Michaels sometimes carries test tubes but these are too big, with threaded caps.
Where have you been able to buy them?