US Patent 10104975 Threaded plugs in furniture being partially submerged

A submergible furniture is disclosed. Said submergible furniture comprises a threaded plugs, an outer shell and an internal cavity is configured to be partially submerged in a external body of liquid having a external liquid level. Said internal cavity is sealed by said outer shell and said threaded plugs. Said internal cavity comprises a gas portion and a liquid portion. Said liquid portion comprises an internal liquid level. Said submergible furniture is configured to be partially submerged in a external body of liquid. Said internal liquid level is higher than said external liquid level. Said internal cavity is selectively sealed with said threaded plugs. Said threaded plugs comprises a female plug portion and a male plug portion. Said female plug portion is welded into a portion of said outer shell. Said female plug portion is plastic welded into a portion of said outer shell.