The Usage of A Rubber Hot Water Bottle for Both Hot And Cold Applications Is As Follows:

1. Hot water usage method:

o Choose a reliable hot water bottle that is not damaged or torn.

o Before use, rinse the bottle with hot water to ensure it is clean inside. Also, check the sealing performance to ensure there is no leakage.

o Let the boiled water sit for a bit until it cools down to a suitable temperature for pouring into the hot water bottle (be careful not to pour boiling water to avoid bursting the bottle).

o Pour the hot water into the bottle, filling it to about 70% capacity, leaving some space for the bottle to better conform to the body's curves.

o Gently squeeze the hot water bottle to expel any air bubbles, then tighten the cap to ensure it does not leak.

o Place the hot water bottle on the desired part of the body, being careful not to place it directly against the skin to avoid burns. You can wrap the hot water bottle with a towel or cloth to increase insulation and comfort.

o Be particularly careful with safety during use; do not place the hot water bottle under pillows or under the covers, as this could cause it to burst and result in burns or fire. Avoid flattening or over-squeezing the hot water bottle, as this could damage it or cause leaks.

o After use, pour out the hot water and let the bottle cool naturally before storing it.

2. Cold water usage method (some silicone hot water bottles support this function):

o Choose a hot water bottle that supports cold water heating (such as a silicone hot water bottle).

o Pour cold water into the hot water bottle.

o Place the filled hot water bottle into the microwave to heat (the specific heating time needs to be adjusted according to the size of the hot water bottle and the power of the microwave, usually, a large hot water bottle takes about 2 minutes to heat, and the heating time should not exceed 3 minutes). Note that the knitted cover should not be placed in the microwave.

o After heating, take out the hot water bottle, gently squeeze out any air bubbles, and then tighten the cap.

o As with hot water usage, be careful not to place it directly against the skin to avoid burns.

o After use, pour out the water, let the hot water bottle cool naturally, and then store it.

Whether using hot water or heating cold water, it is important to regularly replace the hot water bottle, avoid prolonged use, and supervise children when they are using it for safety reasons.