Display Posts in Custom Post Types Timber

It’s a late reply and I suspect you might have it figured out already, but if someone is looking for the same info, here’s an example.

{% for post in posts %}
    {% set post_terms  = post.terms('tour_category') %}
    {% if function( 'has_term', 'Sightseeing Tours', 'tour_category' ) %}
        {% set teaser="sightseeing" %}
    {% elseif function( 'has_term', 'Golf Breaks', 'tour_category' ) %}
        {% set teaser="golfbreak" %}
    {% elseif function( 'has_term', 'Walking Tours', 'tour_category' ) %}
        {% set teaser="wlkingtour" %}
    {% endif %}
    {% include ['teases/_tease-'~teaser~'.twig', 'teases/tease.twig'] %}
{% endfor %}