First, ‘leafs’ sounds like ‘liefs’ in Dutch, which means ‘lots of love’ like at the end of a letter. It is true that the plural of leaf is either leafs or leaves. Problem is, it should be leaves here, as it is about tea. Leafs is only used when emphasizing individual leaves, such as the Toronto Maple Leafs hockey team or the leaf of a book.
So the wordplay isn’t really that clever. Me no like. Have a look yourself.