Device for detecting analyte in sample

A container comprising:

• a) a chamber having an opening and external screw threads disposed proximate the opening;
• and
• b) a lid for covering the opening of the chamber, the lid having a circumferential lid edge comprising an outer surface extending circumferentially around the lid and internal screw threads that rotationally engage the external screw threads of the chamber;
• and
• c) an indicating device configured to indicate whether the lid covers the opening at an appointed position at which a liquid tight seal of the opening is formed when the lid and the chamber are rotated relative to each other to close the chamber,
• wherein the indicating device comprises an elastic element having an elastic modulus for elastic deformation, the elastic element disposed on the chamber and a non-elastic element disposed on the outer surface of the lid edge,
• wherein the indicating device generates a knocking sound when the lid covers the opening at the appointed positions, the knocking sound resulting from elastic deformation and rebound of the elastic element disposed on the chamber upon interaction with the non-elastic element disposed on the lid edge,
• wherein the non-elastic element has a length that extends along the outer surface partially around the lid and the elastic element and the non-elastic element are in rotatable engagement with the internal and external screw threads,
• wherein the elastic element is pressed by the non-elastic element when engaged during rotation to close the chamber and undergoes elastic deformation and then rebounds to return to its original shape and status thereby making the knocking sound once the elastic element passes over a sliding surface of the non-elastic element during rotation to close the lid, the sliding surface being substantially parallel to the outer surface of the lid,
• wherein the knocking sound indicates formation of a liquid tight seal of the opening,
• wherein the elastic element and the non-elastic element each have sloped surfaces that are perpendicular to the outer surface of the lid and that oppose and engage each other when the lid is rotated to open the chamber, the sloped surfaces operably configured to elastically deform the elastic element in a direction perpendicular to the direction of lid rotation, and
• wherein the rotation of the lid to open the chamber urges the non-elastic element to pass over the top surface of the elastic element thereby allowing removal of the lid.