Anyone who sends a tweet to the machine while standing in front of it will receive a free sample of BOS Ice Tea, a popular organic beverage made in South Africa from Rooibos, an indigenous plant which locals have used to make traditional tea for hundreds of years.
Companies have claimed that DMAA is a natural dietary ingredient from the geranium plant, previously used in tea infusions and from other studies using geranium oil.
She said she was too old to walk around her garden with him, but he should pick a leaf of any plant that interested him and they could discuss it over a cup of tea.