Plastic taste in water

No problem keeping water cold for a one hour bike ride. Just fill the bottle to the brim with ice cubes and top off with water. For me the real problem is plastic after-taste. In ice water the taste is barely noticible. In tepid water the taste is stronger. If water is kept in the bottle over night at room temperature the taste is quite noticible. I have a variety of stainless steel vacuum containers that impart no noticable taste to water

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