HydroSpikes can be set up with multiple plants to one reservoir. Here is a picture of one setup we have. Plants doing pretty well for weeks at a time when on vacation. You also can use an inverted flat garbage lid to place all your plants in it.
I travel a lot on business and I really love to have growing things around my house, so this was a great answer to my problem of who to water the plants while I’m gone, so thank you.