Plastic bottle has peripheral ribs with concave upper surfaces which fit against convex lower surfaces on ribs above when bottle is compressed, barb on rod attached to base interlocking with hooked section in neck

摘要

The plastic bottle has peripheral ribs (13) with concave upper surfaces (15) which fit against convex lower surfaces (16) on the ribs above when the bottle is compressed for disposal. A barb (21) on a rod (20) attached to the base (19) of the bottle then interlocks with a hooked section (25) in the neck.