Retainers include at least one center body component comprising a plurality of center body troughs, and at least one compatible component comprising a plurality of compatible troughs, wherein at least part of the plurality of the compatible troughs couple with at least part of the plurality of center body troughs. In addition, thermal displacement devices incorporate at least one retainer and at least one additional component, wherein the at least one retainer is coupled at least in part to the at least one additional component through a contact area or a substrate, surface or combination thereof, wherein the at least one retainer is coupled with the substrate, surface or combination thereof through a contact area.