Abstract:
A spill resistant cup comprising: a substantially hollow body; a lid, where the lid is removably attached to the body such that the lid spans the top of the body and where the top of the lid has an opening; and an insert located between and spaced from the top of the lid and the bottom of the body, where the insert has an opening and where the opening in the insert aligns with the opening in the lid. The insert, along with the alignment of the openings, allows a user to drink from the cup unimpeded while preventing liquid from within the cup from spilling out in significant quantities when the cup is tipped over.

Description:
CROSS REFERENCE 
       [0001]    This application is based on and claims priority to U.S. Application No. 61/790,803 filed Mar. 15, 2013 and U.S. application Ser. No. 14/211,365 filed Mar. 14, 2014, which are incorporated herein by reference. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    1. Field of the Invention 
         [0003]    This invention relates generally to a cup, and more particularly, but not by way of limitation, to a spill resistant transition cup. 
         [0004]    2. Description of the Related Art 
         [0005]    The transition from baby bottles to drinking from a regular cup is difficult for children. The mechanism of drinking is different, and a cup must be held more carefully than a baby bottle to prevent spills. Many children stop drinking from baby bottles before they have the dexterity necessary to drink from a cup without spilling its contents. One common solution is the sippy cup. A sippy cup typically has a lid with a spout and a valve, through which the contents of the cup may be drunk. The valve helps prevent spills should the sippy cup tip over. 
         [0006]    The valve forces a user to suck on the spout, making the mechanism of drinking from a sippy cup similar to that of drinking from a baby bottle. The sucking process can also cause excruciating inner ear pain in children that are experiencing sinus congestion and/or infections. The valve is often made of silicone or a similar substance that must be separately washed. Washing a valve may be quite difficult due to its shape, and thus sippy cup valves are frequently less than ideally clean and often require regular replacement. Constantly sucking on sippy cup spouts may adversely affect the development of a child&#39;s teeth and mouth. Similarly, chewing on a sippy cup spout, as often happens, may not be healthy for the child. The use of a sippy cup may also discourage a child from learning how to properly drink from a regular cup, as the sippy cup may be held at any angle while drinking without spilling. 
         [0007]    Other populations would likewise benefit from a cup that is spill resistant, such as the elderly and those with dexterity issues. 
         [0008]    Based on the foregoing, it is desirable to provide an alternative to the sippy cup that provides a proper transition from a baby bottle to a standard drinking cup. 
         [0009]    It is further desirable to provide a cup that simulates the feeling of drinking from a regular cup while providing some spill resistance. 
         [0010]    It is further desirable to provide a spill resistant cup that does not have a valve. 
         [0011]    It is further desirable to provide a spill resistant cup that encourages children to learn how to hold a cup properly while drinking from it to prevent spills. 
       SUMMARY OF THE INVENTION 
       [0012]    In general, in a first aspect, the invention relates to a spill resistant cup comprising: a substantially hollow body with a top and a bottom, where the bottom of the body is closed and the top of the body is open; a lid with a top and at least one side wall, where the lid is removably attached to the body such that the lid spans the top of the body and where the top of the lid has an opening; and an insert located between and spaced from the top of the lid and the bottom of the body, where the insert has an opening and where the opening in the insert aligns with the opening in the lid. The body may have one or more flat panels such that when the cup tips over it tends to rest on one of the one or more flat panels. The opening in the lid may not align with any of the one or more flat panels of the body. 
         [0013]    The body may have a rim adjacent the top, the lid may have a rim, and the lid may removably attach to the body via the two rims. The at least one sidewall of the lid may comprise the rim of the lid. The rim of the body may have a tab and the rib of the lid may have a corresponding recess such that the lid may be removably attached to the body in only one orientation. The rim of the body may have threads and the rim of the lid may have corresponding threads such that the lid may be screwed onto the body. 
         [0014]    The top of the lid may have a truncated hyperbolic paraboloid shape. The at least one sidewall of the lid may have one or more flat portions aligned with the one or more flat panels of the body. The spill resistant cup may further comprise a trough located adjacent the opening in the lid such that liquid must travel along the trough to exit the cup via the opening in the lid. The lid may further comprise a vent hole, and the insert may further comprise a vent hole. The vent hole in the insert and the opening in the insert may be a single slit. The insert may be removably attached to the lid, or may be integral to the lid. A hood may be located between the opening in the insert and the opening in the lid. One or more posts may extend downward from the insert. The one or more posts may be located adjacent the opening in the insert. The cup may be insulated. 
         [0015]    In a second aspect the invention relates to a spill resistant cup comprising: a substantially closed vessel with an interior shape defining an interior space, where the vessel has a top and an opposing bottom, and where the vessel is shaped such that it has one or more predictable landing positions, where a landing position is a position in which the cup comes to rest when placed on a surface other than on its bottom; an opening in the top of the vessel, where the opening is positioned such that it is not down when the cup is in any of the predictable landing positions; and an insert between the top and the bottom of the vessel with an opening aligned with the opening in the top of the vessel, where the insert has a perimeter matching the interior shape of the vessel at the location of the insert such that liquid cannot travel past the insert other than through the opening in the insert. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0016]      FIG. 1  is a perspective view of the spill resistant cup; 
           [0017]      FIG. 2  is an exploded view of the spill resistant cup; 
           [0018]      FIG. 3  is a top view of the spill resistant cup; 
           [0019]      FIG. 4  is a bottom view of the spill resistant cup; 
           [0020]      FIG. 5  is a cut away view of the spill resistant cup; 
           [0021]      FIG. 6  is a perspective view of the spill resistant cup, showing the cup landing on its front and coming to rest on its side; 
           [0022]      FIG. 7  is a perspective view of an alternate insert design; 
           [0023]      FIG. 8  is a top view of the alternate insert design; 
           [0024]      FIG. 9  is a side view of the alternate insert design; 
           [0025]      FIG. 10  is a front view of the alternate insert design; 
           [0026]      FIG. 11  is a bottom view of the alternate insert design; and 
           [0027]      FIG. 12  is a perspective view of the spill resistant cup with insulation and an alternate insert design. 
       
    
    
       [0028]    Other advantages and features will be apparent from the following description and from the claims. 
       DETAILED DESCRIPTION OF THE INVENTION 
       [0029]    The devices and methods discussed herein are merely illustrative of specific manners in which to make and use this invention and are not to be interpreted as limiting in scope. 
         [0030]    While the devices and methods have been described with a certain degree of particularity, it is to be noted that many modifications may be made in the details of the construction and the arrangement of the devices and components without departing from the spirit and scope of this disclosure. It is understood that the devices and methods are not limited to the embodiments set forth herein for purposes of exemplification. 
         [0031]    In general, in a first aspect, the invention relates to a spill resistant cup with a body  1  and a lid  2 , as seen in  FIG. 1 . The body  1  may be hollow, such that it may hold fluid for drinking. The body  1  may be at least partially curved, and may have at least one flat portion  3  to encourage the spill resistant cup to settle on the flat portion  3  if tipped over. Alternately, the flat portion  3  may not be flat, but may be substantially flat, gently curved, or curved. The body  1  may be generally cylindrical or may have an hourglass shape, as shown, or any other desired shape. For example, the body  1  may be an elliptic cylinder or other cylinder with a non-circular cross section, such as an oval cross section. If so, the flat portion  3  may not be flat, but may be merely an area along the existing curve of the cylinder. The body  1  may have an open top  4  and a closed bottom  5 . The bottom  5  may be generally flat, and may have a protrusion  6  along its edge and a circular protrusion  7  on its face, as shown in  FIGS. 4 and 5 . The body  1  may optionally be at least partially insulated, as shown in  FIG. 12 . 
         [0032]    The body  1  may have a rim  8  extending upward adjacent its open top  4 . The lid  2  may have a corresponding rim  9  extending downward, such that lid  2  may attach to the body  1  along the rims  8  and  9 . Rim  8  may have a tab  10  and rim  9  may have a corresponding recess  11 , ensuring that the lid  2  is placed on the body  1  in a desired orientation. In general, it is desirable for the flat portion  3  not to align with any opening in the lid  2  to minimize the possibility of liquid escaping the spill resistant cup if it tips over and comes to rest on the flat portion  3 . The tab  10  and recess  11  may be oriented such that the flat portion  3  is 90° from the opening  12  in the lid  2 , as shown. 
         [0033]    The rims  8  and  9  may form a twist lock, such that the lid  2  may be placed on the body  1  and twisted a short distance, causing the twist lock to engage, thus preventing the lid  2  from being removed from the body  1  without untwisting. Alternately, the rims  8  and  9  may be threaded such that they may be joined to each other by twisting. Alternately, the rims  8  and  9  may join together through a friction fit. Alternately, the rims  8  and  9  may have any other appropriate mechanism for attaching to one another such that the lid  2  may be secured to the body  1  via the rims  8  and  9 . The spill resistant cup may have a gasket (not shown) located at the rims  8  and  9  to prevent leakage of fluid from the cup. 
         [0034]    The lid  2  may have an opening  12  through which liquid in the cup may be drunk by a user. The opening  12  may be circular or oval-shaped, as shown in  FIGS. 1 through 3  and  6 , or any other desired shape. A vent hole may be located in the lid  2  opposite the opening  12 . The lid  2  may be saddle-shaped or, more particularly, shaped like a truncated hyperbolic paraboloid, as shown. This shape may make it difficult for the cup to rest upside down on the lid  2 , encouraging the cup to rest on its side if dropped. Alternately, the lid may have any desired shape. The lid  2  may have a center depression  13 , which may be oval-shaped. The lid  2  may have a generally vertical side wall  14 , which may be generally curved. The side wall  14  may have at least one flat portion  15 , which may align with the at least one flat portion  3  to further encourage the cup to rest along these flat portions  3  and  15  when tipped over, as shown in  FIG. 6 . Again, the flat portion  15  may or may not be actually flat, depending on the geometry of the lid  2 . The flat portion  15  may not align with the opening  12 . The opening  12  may be located at a point 90° from the flat portion  15 , or otherwise out of alignment such that the opening  12  is not pointed downward when the cup is resting on the flat portion  15 . The front of the lid  2  may be higher or lower than the back of the lid  2 , again to encourage the cup to tip onto its side if it lands or is placed upside down on its top. 
         [0035]    The lid  2  may have a trough  16  adjacent the opening  12  such that liquid from within the cup must travel along the trough  16  to exit the cup via the opening  12 . When the cup is upside down or on its side, this trough  16  may prevent liquid that has collected within the lid  2  behind the trough  16  from reaching the opening  12 . 
         [0036]    The lid  2  may have a vent hole located opposite the opening  12  to allow air to enter the cup when the user is drinking or pouring liquid from the opening  12 . 
         [0037]    An insert  17  may be attached to and extend downward from the lid  2 . The insert  17  may be attached to the lid  2  either permanently or removably via one or more elongate structures or assemblies. For example, as shown in  FIG. 2 , the insert  17  may be attached to the lid  2  via a single assembly comprising a cylinder  18 , which may be attached to the lid  2 , and a cylinder  19 , which may extend upward from the insert  17 . The cylinder  19  may removably attach to the cylinder  18 , allowing the insert  17  to be easily removed for cleaning. The insert may extend into the body  1  and may be circular or other shape to match the shape of the interior of the body  1  at the point the insert  17  hits. The insert  17  may be sized such that it fits closely along the interior wall of the body  1 , preventing liquid from traveling between the insert  17  and the wall of the body  1 . The insert  17  may have one or more holes  20  therethrough. As shown in  FIG. 2 , one hole  20  may be aligned with the opening  12  in the lid  2 , while a second hole  20  may be opposite the first hole  20 , allowing air to travel from above the insert  17  to below the insert  17  when liquid is traveling through the hole  20  aligned with the opening  12 . The second hole  20  may be smaller than the first hole  20  to minimize how much liquid can travel through the second hole  20  when the cup is dropped or tipped other than during proper use. Alternately, the hole  20  may be a single slit extending across the insert  17 , as shown in  FIG. 12 . The slit design would allow liquid to travel through one end of the slit while air is vented through the opposite end of the slit. If the hole  20  is a slit, it may be parallel to the flat portion  15  or the plane in which the flat portion  15  lies, if the flat portion  15  is not flat, so that the hole  20  is not pointed downward when the cup is resting on the flat portion  15 . 
         [0038]    The insert  17  may be substantially flat, as shown in  FIG. 2 , or may be angled, as shown in  FIGS. 7 through 11 . A hood  21  may extend upward from the insert  17  and over the first hole  20 , preventing liquid splashing through the first hole  20  from traveling directly to the opening  12  in the lid  2 , thus further preventing unwanted spills. The hood  21  may be open on its sides to allow liquid traveling through the first hole  20  to continue to the opening  12  when the cup is tipped intentionally. One or more posts  22  may extend downward from the insert  17  near the first hole  20  to prevent ice located within the cup from blocking the first hole  20  during use. 
         [0039]    During use, a user may drink from the cup via the opening  12 . As the user tips the cup to drink from the opening  12 , liquid from within the body  1  may travel through the hole  20 , along the trough  16 , and out the opening  12  unimpeded, simulating the experience of drinking from a regular cup or glass. If the cup is tipped in any other direction, the amount of liquid that can travel through the holes  20  may be limited by their location. For example, if the cup is tipped on its side, no liquid can reach the holes  20  unless the cup is more than half full. If it is more than half full, the speed at which liquid can travel through the holes  20  may be limited because both holes will be covered with liquid, creating a weak vacuum. Any liquid that does travel through the holes  20  would then have to fill the space between the insert  17  and the lid  2  at least halfway to reach the opening  12 , which may further limit the quantity and speed of liquid that ultimately spills. This may provide the user an opportunity to right the cup before liquid is spilled, or at least limit, if not entirely prevent, liquid from spilling from the cup if it is left on its side. The hood  21  may further limit the speed and quantity of unwanted spills. The shape of the cup may allow it to rest in this optimal side-lying position regardless of how it initially lands. The trough  16  may further impede the liquid from spilling when the cup is oriented other than for normal drinking, particularly if it lands or is placed upside down. The shape of the lid  2  may encourage the cup to fall on its side if placed upside down, but if not, the liquid must accumulate in the space between the insert  17  and the lid  2  at least as high as the length of the trough before liquid can reach the opening  12 . 
         [0040]    Whereas, the devices and methods have been described in relation to the drawings and claims, it should be understood that other and further modifications, apart from those shown or suggested herein, may be made within the spirit and scope of this invention.