The invention concerns lipids functionalized with a hydrophilic linker which contain a tethering group for binding to a surface. The optical member has light reflectivity that is higher at an end of the plane of the optical member than at the center thereof. The deformable layer is mechanically coupled to the functional layer at a junction. In addition to storing beverage ingredients, the stackable container system can also be used to store other edible and inedible ingredients.