How should I store this bar soap so it lasts longer and doesn't turn mushy?

Solid bar soap softens and dissolves quickly when it sits in water, so the most important rule is to keep it dry between uses. Place the bar on a draining soap dish with holes or ridges so water runs off and air can circulate around it. Do not leave it in a wet puddle on the sink or in a soap tray that collects water. After washing, give the bar a moment to drain before putting it away.

If you carry this soap in a gym bag, do not pack it while it is wet. Let it air-dry first, or use a ventilated travel soap box that allows moisture to escape. A wet bar sealed in a plastic bag or airtight container can become soft, sticky and messy, and it may also transfer scent to your other belongings.

The 140 g size is meant for regular household use, but how long it lasts depends on how often you use it, how much water it is exposed to and how hard your water is. Hard water can make soap lather less easily, which sometimes leads people to use more. To make the bar last longer, do not hold it directly under the running water while you wash; lather it in your hands or on a washcloth instead. You can also cut the bar in half and keep one piece in use while the other stays dry, which is a common way to extend the life of a solid soap.

Store the soap away from direct heat and strong sunlight, because heat can soften it and make the fragrance fade. With simple habits like these, a 140 g bar can remain firm and pleasant to use until it is nearly finished.