Decaffeination this trait could be bred into other coffee plants by crossing them with "C. charrieriana", or an equivalent effect could be achieved by knocking out the gene for caffeine synthase in normal coffee plants. Tea may also be decaffeinated, usually by using processes analogous to the direct method or the CO process, as described above. The process of oxidizing tea leaves to create black tea ("red" in Chinese tea culture) or oolong tea leaves from green leaves does not affect the amount of caffeine in the tea, though tea-plant subspecies (i.e., "Camellia sinensis sinensis" vs. "Camellia sinensis assamica") may differ
Canned tea Canned tea Canned tea is a relatively recent method of marketing tea which has been sold traditionally as leaf tea and also, for the last 100 years, in tea bag form. It utilises the canning process to produce a ready made drink. Perceived advantages are ease of use (minimal or no preparation time) and the possibility of additives (such as flavours or sugar); the disadvantages are the cost of shipment (and therefore the price of the product) and a lack of freshness. Tea is a beverage made by steeping processed leaves, buds, or twigs of the plant Camellia sinensis in