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These are all solid. If these are just natural daylight then think about what's around the subject. Daylight changes colour depending on all sorts of things like time of day / weather etc. Nearby surfaces also introduce colour. If you want to have consistent colour at the time of exposure then a light source and some kind of controllable space. You could build a very simple frame with some wood, an A2 sheet of white card for the background, white tracing paper for the sides/roof. You could stick some kind of stand out from the background to mount products on so they appear suspended and so you don't have to worry your body introducing colour/shadow/fill etc.
If you're considering a buying a light/lights then remember that cheaper (and even more expensive ones) will introduce some kind of colour that isn't actually white so if you're trying to minimise the amount of post production then adjust your settings in camera accordingly.
Personally I'd stick with things as they are.
I’m not, perhaps that’s a more sensible place to start.
I don’t mind the pictures I’m taking currently, just think it’d look better when they’d be uniform in terms of white balance mainly. But that’s probably more a lighting thing than a lens thing now you mention it.