There is however one pony extremely appropriate to be place alongside Rainbow and whose colors come close enough to what the needle caps provide. Apart from me being very much in favor of giving Rainbow Dash and Scootaloo more time together she may also help to reduce the future need for blue needle caps only in the mosaic expansions of upcomming years ;)
Thank you very much :)
I hope it is better to use it that way than adding those needle caps to the huge amount of plastic waste we are producing.