Set of micro resistance straw-like tubes for thin liquid swallowing practice. This set is part of the TheraSIP Swallowing Trainer but is now available separate from the kit. These micro-resistance tubes have microscopic interior diameters which require a substantial amount of effort to suck. The size of the thin liquid bolus sucked is only a very small trace amount which allows for safe repetitive swallowing practice. To be used as part of formal swallowing rehabilitation. Not for functional use as a drinking straw. Comes in three sizes (blue, orange and red).