18L Upright-Bottle Insulated Backpack

With external measurements of 30 x 15 x 40 cm and a total weight of just 0.88 lbs (400 g), this 18L backpack cooler balances compact portability with real-world utility. Its defining feature is the dual-compartment architecture: a lower insulated chamber lined with heat-sealed, water-resistant aluminium foil — purpose-built for secure, leak-resistant milk bottle storage and fast wipe-clean maintenance — and an upper fabric compartment offering flexible space for breast pumps, charging cables, or everyday carry items (not waterproof). Cold-holding capability comes from integrated high-density foam and thermal lining, working effectively alongside standard reusable ice packs (not included). It holds up to six 9oz bottles upright — compatible with both wide- and narrow-neck formats — supporting consistent temperature control and spill-free transit. Neutral styling and minimal branding allow seamless integration into workplace, nursery, or lifestyle settings. Cleaning protocol: hand wash or damp-cloth wipe only; air-dry naturally in shaded, ventilated areas — machine washing or artificial heat may degrade insulation or seam integrity.