This creation provides a kind of extending protection nested structure with what feeding bottle； it is to be made of a kind of nontoxic, tasteless and flexible material； the extending protection nested structure includes: an extending ontology； it is constituted by a top, an extension and the bottom from top to bottom sequentially connected； the top has an opening； and there is an accommodating space in the extending ontology, which is connected to the opening； And a helical form hole, surround setting what extension. By above-mentioned design, this creation can be effectively prevented from feeding bottle corrupted or rupture, and can widely apply the various feeding bottles of what.本創作提供一種用於奶瓶之可延展保護套結構，其係由一種無毒、無味且具有彈性的材質所構成，該可延展保護套結構包含：一可延展本體，其藉由由上而下依序連接的一頂部、一延展部及一底部所構成，該頂部具有一開口，且該可延展本體內具有一容置空間，該容置空間連通該開口；及一螺旋狀孔洞，其係圍繞設置於該延展部。藉由上述之設計，本創作能有效地避免奶瓶壞損或破裂，並可廣泛地應用於各種奶瓶。
