A foam pump including a pump housing with a liquid chamber in fluid communication with a foamable liquid filled container and an air chamber in fluid communication with a high pressure air source through an air inlet. To request a service session, a remote computer transmits a \u201cprobe request\u201d to a unique network address associated with the service provider. The tiles and memory controllers are responsive to the instructions to group the tiles into a plurality of virtual domains, each virtual domain associated with at least one memory controller, and to store a mapping unique to each virtual domain in the mapping storage. Techniques are disclosed herein for achieving a high programming bandwidth while reducing the worst case current andor power consumption. This enables the brightener content to be reduced under 10 ppb, and so the end product may also be used in contact with foodstuffs.