Strong black tea and cola drinks may irritate your bladder and lead to incontinence. So you do well to avoid these drinks. A number of tea combinations exist for Urinary incontinence as well as herbal supplements, but you'll have to do your market research is you decide on a blended tea. Some ingredients of such mixtures include:

rehmannia root, fried common yam, Chinese angelica root, cinnamon bark, prepared aconite, lindera root, wolfberry fruit, prepared Chinese dodder seed, eucommia bark in ginger, fried antler glue, Asiatic cornus fruit, alpinia fruit, manitis egg case and Chinese leek seed.

Be prepared for products from Asia, as these seem to dominate the market.