Thermos 158035 Family Cool Bag, Navy, 30 Litre
Product description
What it is
The Thermos 158035 Family Cool Bag is a 30 litre insulated bag designed for everyday use, keeping snacks and drinks cool during commutes, picnics or days out. It features a multi-layered polyethylene foam insulation and a durable 500D polyester outer shell, aimed at providing practical, all‑round storage for family trips without fuss.
Key features
This model combines insulation with straightforward practicality: PEVA heat-sealed lining to help minimise leaks, a large front zipped pocket for utensils or napkins, and an adjustable shoulder strap for comfort when carrying heavier loads. The outer fabric is 500D polyester, which is known for resilience against everyday wear and tear. It’s 100% PVC free, which may be important for households prioritising lower toxin exposure in their bag choices. Pack-flat Tabs aid easy storage when the bag isn’t in use.

What matters most
On the page of practicalities, the 30‑litre capacity stands out as a flexible middle ground: large enough to hold a family’s worth of food and drinks, yet not so bulky it becomes unwieldy for short trips. The combination of insulation and a robust outer shell is sensible for day trips, school runs or weekend outings where you want to keep provisions cooler for longer without needing a rigid cooler box.
Real-world use cases


If you’re packing for a family day out, this bag can act as a compact cooler that sits comfortably in a car trunk or under a pushchair. On a school run, it could store lunch boxes and drinks, while weekend picnics might use it for a mix of salads and beverages. The navy colour and straightforward design keep it versatile for various scenarios, with the option to sling it over the shoulder for hands-free transport.

What it’s not perfect for
While the bag offers good practicality, it isn’t a specialised high-performance cooler. If you require ultra-long cooling periods or heavy-duty rugged use (e.g., frequent outdoor expeditions with high load, extreme temperatures), you may still encounter limitations compared with purpose-built systems. Also, the description does not specify a removable liner or extra compartments beyond the front pocket, so organisation inside the main compartment is basic.
Who it’s for
This is well suited to families, casual travellers, and anyone wanting a roomy, affordable insulated bag for everyday cooling needs. If you prioritise a balance of capacity, durability and price without expecting premium-aligned cooling performance, it’s worth considering.

Before you buy – what to check
- Confirm if 30 litres meets your typical load needs (meals, snacks, drinks, and ice packs).
- Consider how you will carry it: the adjustable strap should offer comfortable handling for longer walks or shopping trips.
- Look at the external front pocket as a convenience point for smaller items you want quick access to, such as cutlery or napkins.
- Note that the lining is PEVA heat-sealed and the outer fabric is 500D polyester, if you have a preference for a different material or finish, this should be weighed against price and practicality.


Alternatives in approach
For lighter, more compact use, smaller lunch bags or soft-sided cool bags may be a better fit. If you regularly need to keep perishables cold for extended periods, you might explore bags explicitly designed for longer cooling times or additional compartments.

The decision point: Is it worth it?
Is it worth it?
It makes sense if you need a roomy, everyday insulated bag with a sturdy build and simple organisation for family outings or regular day trips, at a reasonable price. It’s a sensible mid-range choice rather than a high-end cooler, so manage expectations about cooling duration and internal organisation.
Quick FAQ
- How much can it hold? About 30 litres capacity, suitable for a family‑sized transport of meals and drinks.
- Is it easy to store when not in use? Yes, it features Pack-flat Tabs to aid compact storage.
- Is it suitable for frequent outdoor use? It should cope with regular use thanks to the durable outer fabric and insulation, but it isn’t pitched as a specialist expedition bag.
Final thoughts
If you value straightforward practicality, decent capacity and a PVC-free construction, the Thermos 158035 Family Cool Bag offers a pragmatic option. It may not replace a purpose-built premium cooler, but for everyday use where simplicity and durability count, it covers the basics without overkill.
Products with discounts that might interest you
- Sports Gym Bag with Shoes Compartment and Wet Pocket
- FIORETTO Womens Gym Sports Bag with Shoe Compartment
- ZZY Gym Duffle Bag 40L: Versatile, Water-Resistant Weekender for All
- Lightweight Travel Gym Duffel foldable overnight bag
- BAGSMART gym bag 24L with wet pocket
- Fmeida 65L Foldable Travel Duffle Bag
- SPAHER Travel Duffle 25L Cabin Luggage 40x30x20 cm – Foldable Under-seat Holdall
- HOTOR women’s lightweight travel bag (beige) with shoe compartment and wash/toiletry bag, 34 x 45 x 20 cm
- BECOJADDE Gym Bag for Women and Men with Shoe Compartment & Wet Pocket, 35L – Beige
- HPLQQ Ryanair Underseat Cabin Bag 40x30x20
- Easyjet cabin bag 45x36x20 25L underseat
- kasibon 42L Waterproof Sports Duffle Bag with Shoes Compartment, Wet Pocket & Combination Lock
- Lekesky Large Foldable 60L Travel Duffel Bag
- Lekespring Weekend Overnight Bag 25L waterproof holdall
- LOVEVOOK Travel Duffel Bags for Women: Large Carry-On with Shoe Compartment
- MAXTOP Travel Duffle Bag for Women (Carry On Weekender) with Shoe Compartment and Wet/Dry Separation
- Narwey Ryanair Cabin Bag 20L Underseat
- PHSYNI Small Gym Bag for Girls & Women – 16-Inch Duffle with Shoe Compartment
- Easyjet Underseat Cabin Bag 45x36x20 cm (Beige Brown) – 32L Weekender with Wet Pocket and Shoe Compartment
- WEPLAN A9 Grey Green Gym & Travel Duffle Bag with Shoe Compartment, Wet Pocket and Wet/Dry Separation
- BAGSMART 24L Weekend Travel Bag
- 55L Large Sports Holdall Bag for Men — 22 Inch Gym Duffle with Multi Pockets in Blue
- Full Grain Leather Duffle Bag Overnight Weekender by Time Resistance
- ECOHUB 24L Foldable Ryanair Cabin Bags — 2 Pack, Underseat Holdall, Water-Resistant Lightweight Duffel
