this villager trades juice:
/summon minecraft:villager ~ ~ ~ {VillagerData:{type:plains,profession:nitwit,level:2},Offers:{Recipes:[{buy:{id:sweet_berries,Count:3},buyB:{id:glass_bottle,Count:1},sell:{id:potion,Count:1,tag:{CustomPotionColor:14369089,display:{Name:'[{"text":"sweet berry juice","italic":false,"color":"dark_red"}]'},CustomPotionEffects:[{Id:10,Duration:2.5,Amplifier:30}]}}},{buy:{id:glow_berries,Count:3},buyB:{id:glass_bottle,Count:1},sell:{id:potion,Count:1,tag:{CustomPotionColor:16774912,display:{Name:'[{"text":"glow berry juice","italic":false,"color":"yellow"}]'},CustomPotionEffects:[{Id:24,Duration:25}]}}},{buy:{id:melon_slice,Count:2},buyB:{id:glass_bottle,Count:1},sell:{id:potion,Count:1,tag:{CustomPotionColor:15082136,display:{Name:'[{"text":"water melon juice","italic":false,"color":"#cc0066"}]'},CustomPotionEffects:[{Id:5,Duration:25}]}}}]}}



Juice