How to clean the inside of a bottle<br>Fill your bottle less than ¼ full with gravel or rice. If you choose rice, use raw, uncooked rice. If you choose gravel, choose a size in between sand and pea gravel.
Rice and gravel can be used to clean the bottle at the same time.
gravel or rice. It says (or) it doesn't say to use both at the same time.
( z1 possible :ARG1 ( z2 use :ARG1 ( z3 and :op ( z4 rice ) :op ( z5 gravel ) ) :ARG2 ( z6 clean :ARG1 ( z7 bottle ) ) :time ( z8 time :ARG1-of ( z9 same ) ) ) )