CUBA Black Blueberry. CUBA offers nicotine pouches in three delicious flavors, Pineapple, Cherry and Blueberry. The pouches are soft under the lip and provide a good nicotine kick. The CUBA comes in two series which are White-line and Black-line. Black-line comes in a whopping 50mg of nicotine which makes even the most experienced snus user dizzy. However, Cuba White-line comes in 20mg which is more designed for everyday snusing.