Cool bags

The actual cooling time depends on three factors: insulation build-up, cool pack configuration and outside temperature. Standard aluminium-laminated models hold four to five hours with two medium-sized cool packs and outside temperatures up to 25 degrees. EPE foam insulation with reflective lining manages six hours and more, even in sunlight. Important: pre-cool the bag before fillingⁱ in the fridge or with cool packs, then the contents stay cold noticeably longer. At outside temperatures above 30 degrees you should plan for at least two to three cool packs and keep the bag in the shade.

For the classic mass-promotional give-away (bakery, nursery, school sponsorship), 2 to 5 litres in mini-lunch format are ideal — a sandwich, snack and a small drinks bottle fit inside and the price remains calculable. For wine-trade customer campaigns and the specialist-trade gift, 6 to 8 litres is the wine-bottle format — two to three bottles including a cool pack. For the family Sunday outing and team trips, 13 to 18 litres is the right size. From 22 litres upwards, the professional catering-transport and company summer-party applications for four to six people begin.

The aluminium-laminated lining (the standard) reflects heat and is entirely sufficient for short to medium cooling times of four to five hours - the pragmatic B2B option for giveaways and merch items. EPE-foam insulation (the premium build) has a physically thicker wall and buffers heat pickup over six hours and more, and additionally stabilises the internal temperature under direct sunlight. For catering roll-outs, hot-food transport and premium customer campaigns, EPE foam is the right choice; for standard promotional items, aluminium lamination is enough.

All Cool bags in our range are fundamentally decoratable - standard processes are transfer printⁱ (small runs from 25 units, ideal for colour logos), screen print (medium to large runs with simple colour designs) and embroidery (particularly effective on felt-containing models and premium applications). Sublimation printingⁱ only works on models specifically designed for it, such as the BagBase BG960 microfibreⁱ lunch bag - the result is a full-surface photo print. Please supply the print file as a vector, preferably in a spot colour for clean results.

Cool bags are splash-proof as standard, but not guaranteed watertightⁱ – melted ice or spilled drinks can seep through the seams during long standing times. If you need leak-proof applications (ice transport in specialist retail, permanent use of cool packs in catering), choose models with PU-coated polyesterⁱ inner lining and sealed seamsⁱ – or additionally use gel cool packs instead of pure ice, because these do not leak when thawed.

Five brands cover 100% of our cool bag range: L-merch (11 models) and Halfar (11 models) share the top position. Halfar is the German B2B specialist from Bielefeld with particularly well-thought-out snack and sports models, L-merch is the European volume provider with a wide felt and recycling range. BagBase (4 models) brings British streetwear design for sublimation and microfibreⁱ prints, Stamina (3 models) is the Spanish sustainability specialist with rPETⁱ focus, Quadra (1 model) rounds off with robust 600D polyesterⁱ business appearance.

Cool bags must never go in the washing machine – the aluminium lamination and the EPE foam lose their insulating effect. Clean the inner lining damp with a mild washing-up liquid, allow the bag to dry completely open (at least 24 hours) and store it open between uses – closed and damp, mould quickly builds up in the inner lining. In the event of spilled liquids, rinse immediately with warm water and air-dry. With good care, a high-quality cool bag will last five years or more in active use.

We carry the BagBase BG362 Kids Adventure cool bag as a dedicated Kids variant - compact volume, colourful graphics and child-friendly closures. For further Kids applications we recommend the small 2-5 litre models from the adult range (NT3656 Innsbruck, BG288 BagBase Mini) - these are excellently suited as nursery lunchbox bag, school snack or sports club drinks set. For special children's programmes (holiday camp, nursery welcome pack) contact us directly, we will then check the appropriate Sizes and printability for your target group.