I will second @JeanLouiseFinch ideas. Those usually work if you use enough product. Be very generous. For a big storage tub, you will want as much as a whole box of baking soda or several cups of vinegar. And you may have to let the tub sit for even a couple of days if the odor is strong.
The dryer sheet idea works too, if you aren't sensitive to the smell, and can tolerate the smell on whatever you will be storing inside. But I'd choose this after trying the above. And if dryer sheets don't work for you, other things that do have a pleasant smell, like a bar of soap that has a pleasant to you smell, or a candle etc. Just remember all things in the container will then smell like whatever you are adding to cover up the smell, so be sure that won't be a problem later.
I'd first try to determine what the smell is. Is it coming from what is stored inside? Is it because the things need airing and they are what is smelling and not the containers? If it is the contents, they will just transfer the smell back once placed back inside. Is it the location causing the smell? Are you storing the containers in a damp area and the smell is because either the containers or their contents are getting damp or mildew might be forming? Are the containers in a place that is very hot? Getting plastic too hot would probably give off odors too.
As an experiment if nothing else works, try buying one new container (different brand than you already have a problem with), and filling it and storing it. See if over time, it starts to smell the same. If so, it is most likely not the containers, but the contents or the storage conditions that are causing your problem. And try to smell the new containers first. Maybe your containers came with this smell, but you just didn't notice it until they were closed up and used for awhile.
@KayinMN
edited to add: after any kind of cleaning of the tubs, it wouldn't hurt to sit them outside on a nice warm (or sometimes very cold is even better) day, in the shade for several hours. Good old fashioned 'airing out' never hurt anything.