CASSANDRA Hot Water Bottle, Ribbed Surface Both Sides, 1.8 Litre, 5 Year Cassandra Guarantee, Colour Received Varies

A good quality hot water bottle that reassuringly exceeds required British standard BS1970/2012. Kept under a duvet or plenty of blankets the bottle retains a reasonable measure of heat until the morning, which saves the unwelcome chore of having to refill it midway through the night. Its first use is obviously the bed, but there's no reason why it can't be used alongside a blanket, or even by itself, while sitting watching TV or whatever as a cheaper alternative to having heating on. It also saves on the expense of an electric blanket in bed and avoids lying in an electrical field so close to the body. Ribbing on one side allows a choice of temperature variants, which if initially favouring the ribbed side can then be flipped for the warmer underside when desired. It'll take most of a standard-sized kettle, heated to a reasonable degree, but not boiling point as the safety instructions advise. Filling the bottle is safe and relatively quick too. There's a nice solid piece to grip around the neck, and the hole where the stopper goes is sufficiently recessed and large enough to allow sensible pouring without splashback. How well it'll last over time remains to be seen, but with careful use and storage, and a five-year guarantee, it should last for a fair time. I see from the advertisement that there may be some confusion as to what colour one receives as it initially appears that either a blue, red or pink one can be ordered. However, it clearly states that the colour received varies. I'm sure the colours used are for illustrative purposes only to show not only what colours may be received but also to mark the differentiations in product type as there's three variants available: smooth surface on both sides, ribbed surface on both sides, and ribbed on one and smooth on the other (as I ordered and of which this review pertains to). Clicking on the different colours brings up the product types and not necessarily the colour one will receive. Personally, I'm not bothered what colour I receive as a hot water bottle is hardly a fashion statement and is just something to use to keep me warm at night. As long as I receive the correct product type then that's all I'm bothered about (which I did). An all-round excellent buy as far as I'm concerned. UPDATE I've now been using this hot water bottle on a daily basis throughout the winter and can say it continues to perform exceptionally well. Unless the weather is particularly cold and into the minuses, I find I'm getting about eight hours of heat from it (strictly via the bottle, without a cover). Obviously, by the time I get up in the morning the bottle is lukewarm, but with the heat it's maintained in the bed overnight and my own body temperature I'm always adequately warm. There's only been one night that I felt inclined to get up to refill it, and I probably didn't need to. Also, the bottle has shown not the slightest sign of leakage from the stopper or perishing of the rubber. I expect that it will last for the guarantee period but I've decided I'm going to replace it every year or two anyway just to be on the safe side as I tend to use water as hot as I can get away with without it being boiling. It's such a good price and so conveniently available from Amazon that I won't miss spending that amount every once in a while. I'll definitely be ordering another Cassandra hot water bottle though providing they're still available. What I have found is a renewed joy in having a hot water bottle. I seem to sleep better than I did when using an electric blanket, and there's a certain pleasure curling up in a bed warmed this way. Even if current high energy prices were to fall I'll still stick with a hot water bottle. I'm immensely pleased with my purchase.

Very good hard wearing keep bed nice & warm

Great bottle, good size, works well. But this is my third purchase and looking back through my order dates mine have started leaking after 1, or 1.5 years. So I'm not convinced on the 5 year claim. But £5 is fine to pay 1-2 years of use.

Great hot water bottle I have bought this make before as I find them one of the best I have some with ridges and smooth because they make the bed very cosy they are made very well made of very thick rubber and has a safety date stamp the side is just right for my arthritis and is very soft

Great hot water bottle hold the heat for over 8 hours at a time

warmth keeps very warm. safety the cap seems to be very tight. thickness for the price quite good

Just purchased two of these bottles. The quality is good and the cap fits securely. This issue, however, is the date of manufacture that’s stamped on the inside of the neck. Of the two bottles I purchased in January 2026, one was date-stamped October 2025 (which is fine) but the other was stamped September 2024. Given that the manufacturer makes a big deal of the 5 year guarantee (when many other bottles are given a 2 to 3 year life) it’s a shame that one of my bottles is going to be life-ex over a year before the other. My advice? Go ahead and buy one of these bottles because they are indeed good quality, but make a point of checking the date of manufacture when you receive it. If it’s more than a few months old, I’d recommend that you return it and request a more recently manufactured item.

Good quality and good price