can detect when a level of fluid in the container is approaching the mouth application_number US 92652097 A description fig1 illustrates a perspective view of a preferred beverage container 10 in its assembled form referring to fig1 6 the container 10 includes an outer container or shell 3 an inner bag 5 a mouth 7 and a spout 9 the bag 5 is positioned within the outer shell 3 and communicates with the exterior of the container 10 by means of the mouth 7 and spout 9 the container 10 has a front 13 a back 15 a left side 17 a right side 19 a top 21 and a bottom 23 in addition the container advantageously defines a handle 25 as seen in fig2 the outer shell 3 is advantageously configured to be constructed from a single one piece cardboard blank the shell has a front wall panel 16 a back wall panel 18 a right side wall panel 20 a left side wall panel 22 and a side attachment tab 66 the front wall panel 16 defines a circular opening 48 and tapered slits 49 the front wall panel 16 is hingedly attached along a right front fold line 68 to right side wall panel 20 opposite the right front fold line 68 the right side panel 20 is hingedly attached to the back wall panel 18 along a right back right back fold line 70 the right wall panel further defines a lower slot 57 opposite the right back fold line 70 the back wall panel 18 is hingedly attached to the left wall.