How can I keep my grapefruits and bananas safe from getting soft/colored and keeping the nats away?

I can't eat all of those in two days. I have tried few places in the kitchen to protect those fruits. the bananas are lke 4 and the grapefruits are 4.

where is the best place to put those babies? Do I need a hanging fruit thing? haha

How can I keep my grapefruits and bananas safe from getting soft/colored and keeping the nats away?
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