USER-FRIENDLY: Budding geologists can easily transform rough stones into smooth, beautifully polished rocks!

Refill pack for the Thames & Kosmos Rock Tumbler Essential STEM Tool

The leakproof 2-way cap, featuring a smooth spout and wide-mouth top, makes it easy to clean and add ice or supplements, ideal for a big water jug.

EASY HYDRATION: Under Armour's 32 oz squeeze water bottles hold liquid with a quick-shot lid and one-way valve for quick hydration, perfect for sports water bottles squeeze, gym water bottles for men and women, and more.

MAXIMUM HYDRATION: Under Armour's 64 oz water jug keeps beverages cold for up to 10 hours with its foam insulation, making it a great 64 oz insulated water bottle for football water bottles

EASY HYDRATION: Under Armour's 32 oz squeeze water bottles hold liquid with a quick-shot lid and one-way valve for quick hydration, perfect for sports water bottles squeeze, gym water bottles for men and women, and more.