sparecase
nounUK /ˈspɛəkeɪs/
US /ˈspɛrkeɪs/
A sparecase is an extra box or bag where you keep things you might need.
She packed a sparecase with crayons and snacks for the long car ride.
OTHER MEANINGS
2. A second protective cover kept in reserve for a device or tool.
He always travels with a sparecase for his glasses in case the first one breaks.
3. An additional compartment used to hold duplicate parts.
The mechanic opened the sparecase to find a replacement bolt.
4. A small emergency kit carried for unexpected needs.
Her sparecase held a bandage, a pen, and a spare key.