This paper presents a novel bundle management strategy for vehicular Delay/Disruption Tolerant Networking (DTN), named RLAST (Record-based Lifetime-Aware Storage Trimming). The proposed method introduces a dynamic lifetime parameter for each received bundle. Each bundle is associated with a metadata record that includes the lifetime value, which decays under specific network conditions. Unlike conventional approaches that rely solely on message duplication for anti-packet generation, RLAST enables storage-aware deletion of bundles even in sparse or unbalanced topologies. Simulations were conducted using the Scenargie simulator under various vehicle density scenarios. The results demonstrate that RLAST reduces storage consumption more effectively than DTAG and conventional anti-packet schemes in low to medium density environments, while maintaining comparable delivery ratio. However, at higher densities, the method exhibits increased overhead and reduced storage efficiency due to limitations of its deletion mechanism, which may fail to activate in the absence of redundant message encounters. This limitation highlights a potential area for improvement, such as dynamic decay tuning or hybrid triggering mechanisms. Overall, RLAST offers a promising approach for enhancing resource efficiency in DTN-based vehicular networks.