Abstract: A speculum is comprised of a shaft member having a cavity passing therethrough and an outer layer and an inner layer with a bladder, capable of holding a bio-acceptable liquid, disposed therebetween. At least one guide member runs along the lateral length of the shaft member within the cavity. An end cap is attached to one end of the shaft member and an expansion cap is rotatably received within the end cap. A coil spring has one end attached to one of the at least one guide members proximate the distal end of the shaft member and the opposing end attached to the expansion cap. Rotation of the expansion cap into the end cap causes lateral length reduction of the spring which increases coil diameter and thus shaft member diameter and thereby increases the lumen of the device. Counter-rotation of the expansion cap out of the end cap causes coil turn and shaft member diameter reduction.

Abstract: Apparatus for adding carbon dioxide to consumable liquids contained in a container having an aperture of a selected size and shape is disclosed. The apparatus (10) comprises a housing (16) having a cartridge cavity (46), and a connecting means (20), (76) and (98) for securing the mouth (26) of a liquid container (12) thereto. Attached to the housing (16) is a gas conduit (28) having a first end (30) and a further end (32) which extends to the bottom of the liquid container (12). A gas cartridge (34) containing pressurized CO.sub.2 is received in cartridge cavity (46) in a gas-tight manner. The apparatus includes activating means such as a piercing member (48) for rupturing a frangible seal (54) of the cartridge (34). When the frangible seal (54) of the disposable one shot cartridge (34) is ruptured, the pressurized CO.sub.