These are wild caught, lively and healthy, get your new babies now! They are eating fruit flies right now. These are a gray color or a green on their bodies, hard to tell color as they are tiny right now.
Parasteatoda tepidariorum, common house spider
They like to get some water a few times a week, feed every 3 days or more as you like to do. Simple container, with hopefully a fake flower head is nice to have.