Articles of manufacture (“glue-tubes”) are disclosed for dispensing of sticky and/or curable substances. In various embodiments each glue-tube has at least two dispensing ports. Additional ports may be used anytime that a port is obstructed by the dried or cured substance. In some embodiments the dispensing ports may be stacked on top of each other or may be placed side by side or be located at different parts of the glue-tube. In some other embodiments the dispensing ports may be colored differently or may be different in size and/or appearance. In various embodiments the dispensing ports may be opened by unscrewing, turning, pushing, pulling, lifting, or by a combination thereof. In yet other embodiments small pumps may be used to dispense the contained substance. According to the present disclosure, inexpensive multi-port dispensing heads may be manufactured separately for retrofitting any store-bought glue-tubes.