Well, Tomorrow is "Moving Day" (with pics)

[dice]

Neem oil is pretty good stuff. You mix it with some
mild soap (Castille, Murphy's Oil Soap, mild dish soap,
etc), and spray it on like insecticidal soap. It kills
aphids by basically drowning them, and a lot of kinds
of insects find it repellent. In India, people hang sprigs
of the neem tree around their houses to keep mosquitos
away (they apparently dislike the scent), and farmers spray
crops with it to repel a lot of different kinds of predatory
insects. (Not that great for thrips, though, from some
research on TSWV that I read.)

One formula:
1 oz neem oil
1 teaspoon liquid soap
1 gal water

Note that neem oil needs to be at 80F plus to dissolve
properly. Below that temperature fats separate out
from the other parts of the oil, making it chunky and
harder for a liquid soap to emulsify.

There are also pre-mixed commercial neem sprays
where you just mix N teaspoons or tablespoons with
so much water to use it.

While that may give immediate relief, you might also
put some nasturtiums or fava beans in the ground
around the containers, in pots nearby, etc. Aphids love
those and will probably eat them by choice over the
tomatoes. Then you can just cut off aphid-infested
parts and toss them as often as you notice bugs on
them.

Reflective mulches (aluminum pie tins and so on) are claimed
to annoy and confuse aphids. I have no personal experience
with that. I did have them all over fava beans at 2-week
intervals one summer without ever seeing them on tomato
plants growing 6 feet away. (Fava beans will grow all summer
up here, even though they are a cool-weather crop most
places. Some other kind of bean better adapted to the heat
that aphids also like may work better in your summer heat.)

[feraltomatoes]

It is usually only a problem early in the season for me.
Since it is only one plant with a few bugs you could just smash them with your fingers, pluck that one leaf off maybe and poke the others with your fingers as they smash easy.

Predators bugs are just starting to build forces so keep an eye on the others-look under the leaves as shade is where they are happiest.

Dice has good advice for larger outbreaks and prevention.

Brad...

[natural]

We had a problem with aphids last year.

We gathered up a few handfuls of ladybugs and set them on the tomato plants. Then we watched as the ladybugs devoured the aphids before our very eyes.

Bill