Can I use body wash as shampoo?
You can, but it is formulated for skin and tends to leave hair heavy. The shampoos are the better answer.
Which is better for the environment, bottle or bar?
The bars avoid packaging entirely; the 5L refill closes much of the gap for liquid. Both are reasonable choices.
What helps with dry skin in the shower?
Cooler, shorter showers and moisturising while still damp do more than changing product. The fragrance free option is worth trying if skin reacts.
Do the scents match the shampoos?
Yes, the same scents run across hair and body, so a matching set is straightforward.