If you decide you don't like soylent there are a bunch of other products from other more mainstream manufacturers.
Fortisip and Ensure are the two brands I'm most familiar with, but there are others. Fortisip do wide range of different style products (shake, juice, yoghurt, and 'savory'.) But it's an acquired taste.
I'm not sure why they have two trailing slashes. (https://www.nutricia.co.uk/fortisip//)