Patent ID: 8397926

Claim:
A nursing bottle assembly comprising: a rigid outer casing defining a channel around an upper rim thereof; a flexible inner liner comprising a container with a rim, said rim having a depending flange extend around said rim, said depending flange fitting into said channel of said outer casing such that said inner liner is suspended therefrom and hangs down into said outer casing when said outer casing is upright, said container being of a bellows configuration such that said container expands and contracts relative to a longitudinal axis of said container; a teat; and a sealing ring attached to said outer casing so as to secure said inner liner in a position within said outer casing, said inner liner having a top defining an annular surface over which a rim of said teat resides, at least one of said annular surface adjacent said rim of said teat and said upper rim of said outer casing being profiled with projections so as to increase frictional engagement of said inner liner with said teat and of said inner liner with said casing respectively.