Updated: Mar 15, 2019
If you are someone who tends to travel a lot, I would suggest you transplant your plants into net pots that fit on decorative planters without holes. This way you can put water in your planter and use a wick that will go into your net pot which will keep your roots watered.
1. If you are starting out planting herbs, a plant or a flowering plant, I suggest you put your plants into net pots (they come in many sizesand shapes). If the net pot doesn't fit on the edge of your planter, you can insert another container, holding water and your net pot with plant, into your planter. The net pot should fit on your container. Use a lantern wick to transport the water into your plant. The wicks come in many sizes and should be free of chemicals To get your wick inside your net pot, snip a section of the net pot so your wick will go into the pot easily.
I wanted a small flowering plant so decided to plant marigold seeds into a 3 inch net pot inside a mason jar.
Decided to try something new
2. If you have a plant in a planter, you can transport water to your plant by using a watering spike attached to a water bottle. If you have a planter with a hole, be sure to put a deep drip tray under planter to catch run off. The water will then be reabsorbed when bottle runs out of water. If planter does not have a hole, you should make sure there is at least 2" of pebbles at the bottom of your pot so that the roots are not sitting in a pool of water.
Here is a video that offers homemade solutions.