Sipacupa Vervain Tea in a box of 24 tea bags is a single-herb infusion made from vervain — one of the gentler Caribbean bush teas, with a soft, lightly herbaceous character. The 48g pack contains tea bags ready to brew. Brew in freshly boiled water for 4 to 5 minutes. Caffeine-free; particularly good in the evening as a wind-down cup. Vervain has a long place in Caribbean herbal tradition, particularly as an evening tea drunk before bed. Sipacupa is a UK Jamaican tea brand specialising in single-herb bush-tea traditions.