Patent ID: 7430907

Claim:
A fluid container comprising: an outer element defining an opening; an indicator for indicating a condition of a fluid in said container, said indicator being disposed in said opening, said indicator including a response assembly, an indicator head at which exhibited changes are visualized and a light transmissive body connecting said response assembly and said indicator head; sealing structures established between said indicator and said outer element including a plurality of ribs integral with at least one of said indicator and said outer element; said indicator head and said indicator body being made of a first material and said outer element being made of a second material, said second material being softer than said first material; said plurality of ribs including a rib at least one of embedded in said outer element and crushed by said indicator; said sealing structure including a plurality of ribs on said indicator embedded in said outer element; and said sealing structure including annular ribs in said opening at least partly crushed by said indicator.