Mokiki Ferrofluid in a Bottle Magnetic Liquid Display Stress Relief Decompression Educational Desk Toy Gift 2 Liquid Magnets NOVELTY - Ferrofluid, a little monster in a bottle, is the astonishing liquid, which can lead you to a carefree world. But DON'T leave it on a warm environment immediately when opening it in cold winter. Heat-expansion and cold-contraction caused by large temperature difference will make it BROKEN. MANY SHAPES - You may also enjoy the fun and fascinating moments of playing and being creative which you definitely won't be able to resist. You can enjoy the fun and fascinating moments of playing and being creative which you definitely won't be able to resist. You can even make it dance... Use your imagination and create magic! STRESS RELIEF - It's an advanced toy, to help relief press for adults in the fast-tempo society. HALLOWEEN GIFT - It's a good gift for teens to do some science experienments, creative, fun but not boring as normal experiments. NOTE - We improved its packaging and some parts were updated, which makes the ferrofluid more low temperature standable. So no worries for damaged bottle and stains on the glass. <span class="a-text-bold">Item size: </span>1.2*1.2*3.9in/ 3*3*10cm <span class="a-text-bold">Package size: </span>2.7*6.2*2.1in/ 7*16*5.4cm <span class="a-text-bold">Weight:</span> 3.35oz/ 95g <span class="a-text-bold">Volume: </span>30ml The fun of the <span class="a-text-bold">Ferrofluid </span>in a mess-free, sealed display bottle! Tough, impact resistant glass offers easy viewing and interaction with ferrofluid. Each glass bottle contains 2 ounces suspension solution (mostly water, plus some secret ingredients) and a glob of ferrofluid. Please <span class="a-text-bold">DO NOT </span>leave the magnets on the bottle for over 2 mins even if you don&#039;t want to play it. <span class="a-text-bold">It will stain the bottle by the ferrofluid. </span> The liquid in the bottle is non-toxic. Make it out of the reach of children under 14 years old in case of drinking it by mistake. If it happens, please go to hospital immediately. 1* Ferrofluid bottle 1* Instructions 2* Magnets 2* Magnetic handles