Hard Cool Pack or Gel Pack: Which Do You Choose?

Hard cool pack or gel pack: this is the question customers ask us most often. The answer doesn't depend on cooling performance but on one thing: does the packaging come back to you?

The Difference

A hard cool pack has a sturdy plastic housing and lasts hundreds of freeze cycles. A gel pack is a flexible foil pouch filled with gel, lighter and cheaper per unit, but intended for limited reuse.

Does the Packaging Come Back?

If you run fixed routes, work with crates or a deposit system, or it concerns internal logistics between locations, your packaging comes back. In that case, a hard pack is the cheapest option on an annual basis, because you buy it once and use it hundreds of times.

If you ship to end customers who don't send anything back, every pack is a one-time cost. In that case, the gel pack wins: lower unit price, lower weight, and no return logistics to set up.

Weight Matters

With parcel shipping, you pay per kilo. A hard pack weighs more than a gel pack with the same cooling capacity, because the housing adds weight. With thousands of shipments per year, that difference adds up.

Cooling Performance

With equal cooling mass, there's little difference between them. So don't let that be the deciding factor. What does matter is whether the pack is fully frozen through, and that applies to both.

The Math

Divide the price of a hard pack by the number of times you expect to use it, and compare that to the unit price of a gel pack. With a return rate above eighty percent, the hard pack wins almost every time. Below that, it gets close.

Often Both

Many businesses use both: hard packs on fixed routes, gel packs for one-time shipments. That's not inconsistency, but the right tool for the situation.