You can buy only one if you want, but since the Ibotta offer is two, your best off doing this…
At Target through 7/29:
BUY TWO PURELL ADVANCED HAND SANITIZERS 8 OZ, on sale $2
Get $1 cashback from Ibotta for buying Purell Advanced Hand Sanitizer 8 oz or larger (limit TWO)
Use the 5% off Purell Hand Sanitizer Target Cartwheel Offer (exp 7/29; deducts $0.20)
and use two $1/1 Purell Advanced Hand Sanitizer 8 oz or larger printable coupons (preclipped)
Price at Register: $1.80, but get $2 from Ibotta
NET PRICE FOR ALL: FREE + $0.20 PROFIT!