Remi drinks the same amount of water every day for a week except for when he spills some of it. His water bottle holds 20 ounces which he drinks 3 times a day, 20 x 3 = <<60=60>>60 ounces a typical day.
Over 7 days, without spilling anything, Remi drinks 60 ounces x 7 days = <<60*7=420>>420 ounces.
Except Remi spills 8 + 5 ounces of water during the week = <<8+5=13>>13 ounces of water Remi spills.
Total, Remi drinks 420 ounces - 13 ounces of spilled water = <<420-13=407>>407 ounces Remi drank during the week.
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