Demographics:
1	What is your age?
2	What gender do you identify as?
3	What country do you live in (spend most of your days in a year)?
4	What is your employment status?
5	If employed, do you work from home, office, or hybrid?
6	Do you have any food allergies?
7	Do you drink coffee?
Coffee-related behavior:
1	Why do you drink coffee?
2	How often do you drink coffee?
3	If daily, how many coffee beverages do you consume a day on average?
4	What time of the day do you drink coffee?
5	Do you drink your coffee hot or cold?
6	Where do you drink your coffee?
7	What kind of milk do you take with your coffee, if any?
8	Which coffee shop or brand do you prefer the most to drink from?
9	Why do you prefer to drink from the coffee shop/brand you selected in the previous answer?
Attitudes towards non-dairy milk charges at coffee shops:
1	Your opinion on dairy milk alternatives: does the coffee shop you visit or are aware of charge for non-dairy milks (i.e., soy, almond, oats, other)?
2	Should customers pay extra for non-dairy milks (i.e., soy, almond, oats, other)?
3	If the coffee shop did not charge extra for non-dairy milks, would you visit it/order from it more often?
Marketing campaigns awareness:
1	In the last 6 months, have you seen any advertisement for coffee/coffee shop (either in public or online/mobile or other)?
2	Have you seen any advertisement for non-dairy milk coffee beverages in the same period?
Theoretical-Domains-Framework-based questions: How much do you agree with the following statements about non-dairy milk (i.e., soy, almond, oats, other)? (5-point Likert scale)
	TDF Statement	TDF Domain
1	I drink non-dairy milk.	Beliefs about Capabilities
2	Non-dairy milk tastes bad.	Beliefs about Consequences
3	Non-dairy milk is too expensive.	Environmental Context and Resources
4	Non-dairy milk is not available to me.	Environmental Context and Resources
5	My friends/colleagues/family do not drink non-dairy milk.	Social Influences
6	Dairy milk (cow’s milk) should be part of a normal diet.	Beliefs about Consequences
7	I grew up drinking dairy milk (cow’s milk).	Social Role and Identity
8	Non-dairy milk should be part of a normal diet.	Beliefs about Consequences
9	I am conscious of the number of calories I consume.	Behavioral Regulation
10	I am conscious of the number of calories in different types of milk.	Knowledge, Behavioral Regulation