Abstract: A strong, light weight, highly maneuverable dental floss holder has two centrally pivoted support members with holding sections extending on one side of the pivot and a pair of handle sections extending on the other side. Storage for new and used dental floss is provided by supply and take up reels located between the pair of handle sections. The handle sections terminate with a wedge actuated break assembly that restricts undesirable motion of the supply and take up reels. With single hand operation tension of the floss between the tips of the holding sections can be readily controlled and the dental floss can be selectively advanced.

Abstract: A liquid container for the above-ground storage of flammable fuels is shown having an inner tank with a bottom surface, side surfaces, and a top surface placed within an outer shell having a bottom surface, side surfaces and an open top. The bottom surfaces of the inner tank and outer shell are spaced apart from each other, as by first bottom spacers which connect the two bottom surfaces. The side walls of the inner tank and outer shell are also spaced apart from each other, as by second side spacers which connect the tank and shell. The spacers for connecting the tank and shell prevent the inner tank from floating within the outer shell when an insulating material, such as concrete, is added therebetween.