fig1 a shows an embodiment 100 of a drinking straw device disclosed herein , referred to as an “ air - liquid ” device . device 100 includes an inner tube 102 having a first ( top ) end 104 through which a user can apply a sucking ( sipping ) motion with his / her mouth , and a second ( bottom ) end 106 which is dipped into a liquid ( drink ). device 100 further includes an outer tube 108 which surrounds inner tube 102 in a generally concentric way for part of the tube 102 length between ends 104 and 106 . this structure defines a “ chamber ” or “ airway ” 110 around inner tube 102 . outer tube 108 has a first ( top ) end 112 open to the atmosphere and a second ( bottom ) end 114 connecting outer tube 108 with inner tube 102 in such a way that the liquid in which the straw is placed cannot enter chamber 110 . inner tube 102 has in its wall one or more optional lower holes 116 positioned between bottom inner tube end 106 and bottom outer tube end 114 , and one or more upper holes 118 positioned between outer tube end 112 and bottom outer tube end 114 , preferably close to end 114 . fig1 b shows device 100 inserted into an enclosure ( e . g . can , glass or bottle ) 130 filled partially with a liquid 132 . enclosure 130 has an inner bottom surface 134 . lower holes 116 can be positioned very close to inner tube bottom end 106 , thus allowing suction of the liquid even when bottom end 106 is plugged ( by touching surface 134 ) and even when the liquid is almost exhausted . the position of holes 116 close to bottom end 106 also prevents suction of air instead of liquid ( in the case where bottom end 106 is blocked by touching surface 134 ). upper holes 118 are dimensioned to enable introduction of air from the atmosphere , through chamber 110 into the liquid passing through inner tube 102 , yet prevent exit of the liquid into chamber 110 . advantageously , since upper holes 118 are positioned close to the bottom end of the outer and inner tubes , the mixing length of the device is increased without an increase in its length through spherical or helical portions . the flow rate through the inner tube is enhanced . moreover , airway 110 cannot be accidentally plugged ( e . g . by fingers holding the straw ) due to its cylindrical shape . holes 118 are also protected from accidental plugging , being submerged into the liquid and additionally protected from touch by outer tube 108 . the inner and outer tubes may be made by any material useful for drinking straws , for example plastics , glasses or metals . the materials may be flexible , to enable bending . fig2 a shows another embodiment 200 of a drinking straw device disclosed herein , which allows mixing of the consumed liquid with a pre - filled ( stored ) liquid or gel . this is referred to as a simple “ liquid - liquid ” device . device 200 is substantially similar to device 100 , except that an outer tube 108 a has a top end 112 a initially closed to the atmosphere ( see below ). this allows extended storage of a second liquid 242 in a chamber 110 a formed between tubes 102 and 108 a . second liquid 242 is to be mixed with liquid 132 flowing through inner tube 102 . liquid 242 may exemplarily include alcoholic substances , medications / drugs , vitamins , flavors , etc . top end 112 a has a removable cover 224 over at least part of top end 112 a . cover 224 may be for example an adhesive - removable cover that will keep liquid 242 from evaporating . cover 224 must be removed before use to allow air to enter chamber 110 a as the liquid or gel leaves it into the inner tube . upper holes 118 are dimensioned to allow seepage of second liquid 242 into the inner tube under a sucking action and to prevent or restrict flow between chamber 110 a and inner tube 102 when no active action is performed by a user ( consumer ). optionally , as shown in fig2 b , a device 100 or 200 further includes a third tube 206 slideably inserted inside inner tube 102 , and more holes 118 spread along the length of inner tube 102 . third tube 206 serves as an added liquid or air flow control mechanism . the number of exposed holes 118 changes when tube 206 slides along inner tube 102 , thereby changing the amount of liquid or air introduced into liquid 132 flowing through it . tube 206 must be shorter than the length between ends 104 and 118 . fig3 shows yet another embodiment 300 of a drinking straw device disclosed herein , which allows storage and insertion of a solid material into the drink during the drinking action . this is referred to as a “ solid - liquid ” device . device 300 includes a tube 302 having a top end 304 , a bottom end 306 , and a section 326 filled with a soluble substance 328 which is dissolved and incorporated in the liquid passing therethrough . section 326 is bound by membranes 310 and 312 which allow liquid to flow therethrough while holding substance 328 in place . substance 328 may include for example a vitamin , a drug , or a flavor . advantageously , this provides easy storage and longer shelf life . fig4 shows yet another embodiment 400 of a drinking straw device disclosed herein . device 400 combines features of device 100 and device 300 , i . e . includes an outer tube 408 with a top end 412 and a bottom end 414 which surrounds an inner tube 402 in a generally concentric way for part of the tube 402 length which extends between two ends 404 and 406 . inner tube 402 has in its wall one or more lower holes 416 positioned between bottom inner tube end 406 and a bottom outer tube end 414 , and one or more upper holes 418 positioned between top inner tube end 404 and bottom outer tube end 414 , preferably close to end 414 . inner tube 402 includes a section 426 filled with a soluble substance 428 which is dissolved and incorporated in a liquid passing therethrough . this structure thus combines the capabilities and advantages of devices 100 and 300 . fig5 shows yet another embodiment 500 of a drinking straw device disclosed herein . device 500 combines features of device 200 and device 300 allowing storage and mixing of a second liquid into the flow stream of the first liquid through the inner tube . it combines an inner tube 302 with an outer tube 208 , allowing both extended storage of a second liquid 242 as in device 200 and of a soluble substance 328 as in device 300 . this structure thus combines the capabilities and advantages of devices 100 and 300 . fig6 shows yet another embodiment 600 of a drinking straw device disclosed herein , referred to as a “ single side pressurized gas - liquid ” device . device 600 is designed to actively introduce a gas ( e . g . oxygen , co 2 etc .) into a liquid flowing through a tube 602 which extends between a top end 604 and a bottom end 606 . in addition to tube 602 , device 600 comprises an actuator 610 similar to a cigarette gas lighter , which , when actuated , introduces the gas through at least one hole 618 into tube 602 . in an embodiment , actuator 610 includes a chamber 630 filled with a gas source 632 and a gas introduction mechanism 634 for introducing gas from gas source 632 through hole 618 into the liquid flowing through tube 602 . mechanism 634 may include for example a flexible wall section 636 coupled mechanically to a plunger 638 which in a “ closed ” state seals the chamber and in an “ open ” state allows flow of gas from the chamber to hole 618 . actuator 610 further comprises an opening 640 for filling or refilling chamber 630 with gas . the opening is sealed after the filling and / or refilling . fig7 a shows yet another embodiment 700 a of a drinking straw device disclosed herein , referred to as a “ concentric chamber pressurized gas - liquid ” device . device 700 is similar to device 600 in that it is designed to actively introduce a pressurized gas ( e . g . oxygen ) into a liquid flowing through an inner tube 702 which extends between a top end 704 and a bottom end 706 . in contrast with device 600 and similar to device 200 , device 700 comprises an outer tube 708 surrounding inner tube 702 . outer tube 708 is sealed at its top and bottom ends ( respectively 712 and 714 ), thus defining a chamber 730 around inner tube 702 . chamber 730 is filled with a gas source 732 , from which gas can be introduced into a liquid flowing through inner tube 702 through an assembly 717 of a hollow needle 718 and a “ septum ” 720 . as used herein , “ septum ” refers to a wall section which can be penetrated by the hollow needle and which returns to a sealed state after the needle is retracted . the needle has at least one hole 722 on its side and can be pressed for penetrating the septum at an end 724 . in an un - pressed position , view ( a ), the needle is retracted from the septum by a retracting mechanism ( e . g . a spring ) 742 such that septum 720 blocks access of the gas from source 732 to the liquid flowing in tube 702 . in a pressed position , view ( b ), needle 718 penetrates through septum 720 , therefore creating a path for insertion of the gas into the flowing liquid . end 724 may be indicated by a visual ( i . e . color ) or touch ( i . e . a bump ) indicator 740 on outer tube 708 . outer tube 708 further comprises an opening 744 for introducing the gas into chamber 730 . the opening is sealed after the gas is introduced into the chamber . fig7 b shows yet another embodiment 700 b of a drinking straw device disclosed herein . device 700 b is similar to 700 a except that is has two needle and septum assemblies 717 positioned diametrically opposite each other , such that they allow a “ pinching ” action to insert the gas into the liquid . views ( a ) and ( b ) show respectively un - pressed and pressed needle positions . fig8 shows yet another embodiment 800 of a drinking straw device disclosed herein , referred to as a “ manually operated liquid - liquid ” device . in common with previous devices , it includes an inner tube 802 surrounded by an outer tube 808 which is sealed at its top and bottom ends ( respectively ( 812 and 814 ), thus defining a chamber 830 around inner tube 802 . chamber 830 is filled with a second liquid or gel 842 ( similar to 242 above ) to a level 832 . device 800 further includes a first one way valve 850 a installed in top end 812 and a second one way valve 850 b installed inside chamber 830 near bottom end 814 . inner tube 802 has at least one hole 818 similar to holes 118 or 418 . chamber 830 may be pressed at an elastic pressure point 854 to reduce its volume . the volume reduction forces the second liquid or gel in the chamber to pass through second valve 850 b and hole 818 into a liquid flowing through inner tube 802 . a retracting mechanism ( e . g . a spring ) 852 then returns the chamber to its initial volume , creating an atmospheric under - pressure above the second liquid or gel . first one way valve 850 a then allows air to enter the chamber . the action is similar to that of a water gun . in summary , straw device embodiments disclosed herein provide a number of advantageous features : a ) elegant and easy introduction of another substance into a consumed liquid stream ; b ) mixing of atmospheric air with the consumed liquid to create a “ sipping straw ” for a drinking experience similar to the sipping of tea or other beverages ; c ) mixing of an external liquid or gel with a consumed liquid , enabling the seamless introduction of alcohol , vitamins , painkillers , flavors etc into a consumed liquid ; d ) introduction of solubles including salts , vitamins , flavors , nutritional supplements , etc . into the consumed stream ; e ) enabling a user to introduce any easily stored gas , as bubbles , into a consumed liquid ; f ) ensuring the mixing of air with a consumed liquid , thus minimizing the chance of consuming air alone . an external peripheral straw ensures an always open airway which cannot be blocked by holding the straw in a wrong way . while this disclosure describes a limited number of embodiments , it will be appreciated that many variations , modifications and other applications of such embodiments may be made . the disclosure is to be understood as not limited by the specific embodiments described herein , but only by the scope of the appended claims . in addition , citation or identification of any reference in this application shall not be construed as an admission that such reference is available as prior art to this disclosure .
certain drinking straw device embodiments comprise an inner tube having a hole along its length and an actuator for actively introducing a gas or fluid through the hole into a liquid flowing through the inner tube . in an embodiment , the actuator stores and releases a pressurized gas . in some embodiments , the actuator stores and releases a second liquid or gel . in some embodiments , a device comprises a non - pressurized gas or fluid substance introduction mechanism , which , when activated , allows the gas or fluid substance to enter and be mixed with a liquid flowing through the inner tube .