Plastic thin-walled bottle having: ▪ a top part (2,3,4,5) including: - a neck finish including a neck end and a neck support ring; - a neck; - a shoulder; ▪ a tubular body portion joined to the neck by the shoulder, the body portion comprising at least two transversal grooves (6.1) or ribs and having a mean wall thickness (T mean) - in an increasing order of preference - less than or equal to 200; 180; 160; 150 μm; preferably comprised between 65 and 150; and more preferably comprised between 90 and 130 μm; ▪ and a bottom structure opposite to the top part (2,3,4,5), the bottom structure including: - a terminal curved portion, - a bulge; wherein at least one of the top (2,3,4,5) and bottom structure is retractable; the plastic thin-walled bottle being characterized in that it includes at least one terminal retractable part, said at least one terminal retractable part being at least one of: - a terminal retractable part in its top part, said terminal retractable part being retractable under the effect of an axial force, said at least one terminal retractable part in the top part comprising the neck finish (2,3), the neck and at least a part of the shoulder, said terminal retractable part comprising at least one retractation starter (5.1) formed by an annular rib on the shoulder, or - the bulge, the bulge being an outwardly axially extended terminal retractable part in the bottom structure, said bulge being retractable under the effect of the own weight of the thin-walled bottle, when said thin-walled bottle contains a liquid and when the bottom structure of the thin-walled bottle rests on a support, said bulge comprising at least one retractation starter (7.1) formed by an annular groove that joins the terminal curved portion to the bulge. ▪ a top part (2,3,4,5) including: - a neck finish including a neck end and a neck support ring; - a neck; - a shoulder; - a neck finish including a neck end and a neck support ring; - a neck; - a shoulder; ▪ a tubular body portion joined to the neck by the shoulder, the body portion comprising at least two transversal grooves (6.1) or ribs and having a mean wall thickness (T mean) - in an increasing order of preference - less than or equal to 200; 180; 160; 150 μm; preferably comprised between 65 and 150; and more preferably comprised between 90 and 130 μm; ▪ and a bottom structure opposite to the top part (2,3,4,5), the bottom structure including: - a terminal curved portion, - a bulge; - a terminal curved portion, - a bulge; - a terminal retractable part in its top part, said terminal retractable part being retractable under the effect of an axial force, said at least one terminal retractable part in the top part comprising the neck finish (2,3), the neck and at least a part of the shoulder, said terminal retractable part comprising at least one retractation starter (5.1) formed by an annular rib on the shoulder, or - the bulge, the bulge being an outwardly axially extended terminal retractable part in the bottom structure, said bulge being retractable under the effect of the own weight of the thin-walled bottle, when said thin-walled bottle contains a liquid and when the bottom structure of the thin-walled bottle rests on a support, said bulge comprising at least one retractation starter (7.1) formed by an annular groove that joins the terminal curved portion to the bulge.