The vacation watering apparatus is working quite well, looking at the wet soil around the plant. It has a small ceramic cone that goes into the soil in which you fill in water and close it with the green mushroom-like lid. The tube attachment from the lid goes into a water container.
I am also trying out the plant nanny with the water bottle attachment. This one has a ceramic cone and a green spike that attaches to the bottles. The green spike fits into the ceramic cone.
So far so good.
Although I still have some more plants to vacation water. Drip Watering from buddygarden seems interesting, I want to try it out.