hi barry, i am relatively young but have classic deformities in my hands due to rheumatoid arthritis so have had this problem for years. I do what someone else has suggested here and decant them into pump bottles. WHen it gets near the bottom i simply take the top off and the pump out, pour what i need out and then replace the top.
it works for most things with the exception of conditioner. With that i take the top off, pour water in, shake then apply. Those tresemme bottle tops are hard to get off though. I bought these a few year ago and they are still going strong
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Now, if i could only find a gadget to help with tops you have to squeeze and turn at the same time, like bleach or something to help me with cleaning type sprays!